NSEFC2B Unit 13 全单元教案
The Second Period
Teaching Aims:
n and master the following words and phrases:
cube,property,range,medium,relatively,dissolve,pure,relationship,mass,float,absorb,bottom,all the way,that is,add…to,mix with,take advantage of,manage to do
ove the students’ reading ability.
le the students to realize that it is important to protect the water on our planet.
Teaching Important Points:
ove the students’ reading ability.
er the following phrases:
all the way,that is,mix with,take advantage of,manage to do
Teaching Difficult Point:
How to make the students understand the reading passage better.
Teaching Methods:
ussion before reading to make the students interested in what they will learn.
reading to get a general idea of the text.
ussion after reading to make students understand what they’ve learned better.
ful reading to get the detailed information in the text.
Teaching Aids:
multimedia
blackboard
Teaching Procedures:
Step Ⅰ Greetings and Revision
(Greet the whole class as usual.)
T:Yesterday we learnt something about who can tell me what you learned yesterday?
S1:I learned that water is very important to all the living things on the earth.
T:OK,can you give me the reason why it is important?
S2:Water can be used to wash clothing,to made electricity,to water the farm and so course,every day we must drink enough water is very important.
T:Anything else?
S3:I know something about example,from the experiments we made yesterday,I know vegetable oil can’t be dissolved by water.
Step Ⅱ Pre-reading and Reading
T:k you for your answers to my we all know,we can’t live without do you know what makes water so important to all the living things?
Ss:No,we don’t know.
T:Maybe we can get the answer to the question after reading the article for re you read,first let’s learn the new words and phrases in the passage.
(Teacher deals with the new words with the whole class.)
T:Now please read the passage quickly to get the general idea and try to use the following structures to make six questions.
(Teacher uses multimedia to show the structures on the screen.)
is/are ______?
does ______ look like?
are different parts of ______?
can ______ be compared to?
does ______ work?
are some examples of ______?
(Teacher gives students five minutes to finish the fast reading and making minutes later,teacher asks some students to write their questions on the blackboard.)
are the properties of water?
does the earth look like?
are different parts of the ocean?
can the ocean be compared to?
does the special air-conditioner-the ocean work?
are some examples of species in the ocean?
T:Well can tell me the general idea of the text?
S4:The passage mainly tells us it is water that makes the ocean so important to all the living things in the world.
T:Good ,let’s read the passage carefully to get more information about e you are reading,try to finish the chart in Post-reading on Page 21 and find out the answers to the questions on the blackboard.
(Teacher gives students enough time to read the text and collects their information for the chart.)
Suggested answers:
Property What is it? What is it good for?
Chemical structure Every water molecule is made up of two hydrogen atoms and one oxygen atom. It is good for the living things in the ocean to absorb the nutrients easily.
Density The density of pure water is 1 000 kg/m3,meaning that one cubic metre of water weighs one thousand kilogram. It is good for marine organisms to take advantage of the density of water.
Heat capacity Heat capacity is the amount of energy it takes to raise the temperature of a substance one degree centigrade. It is good for the earth to keep the temperature steady.
T:Very about the questions on the blackboard?
S5:I think I can answer the first answer is that the properties of water are chemical structure,salinity density,heat capacity and ocean motion.
S6:In my opinion,the answer to the fourth question is that the ocean can be compared to a great place to live in.
T:Do you agree with them?
Ss:Yes.
T:What about other questions?
S7:I think plankton,sharks and whales are examples of species in the ocean.
S8:The answer to the second one is that the earth looks like an ocean planet.
T:You are quite volunteers?
S9:Dear you tell us the meaning of the special air-conditioner-the ocean?
T:Maybe it means that there are some similarities between air-conditioner and the ocean.
S9:Thank you.I got it.
T:Then,who can answer the question?
S10:Because the ocean can keep the temperature of the earth steady,some students compare the ocean to a special air-conditioning.I think the ocean keeps the temperature of the earth steady by absorbing and releasing heat.
T:Well e is only one question wants to try?(Nobody answers the question.)
T:Do you think it is a question that the text can’t answer?
Ss: think so.
T:e you are I want to know the reason why you think the passage can’t answer the third question.
Ss:Because there is not any information about the different parts of the ocean.
T:Then,are there any questions you would need to add to “cover” all the information in the text?
S11:I have a is the water in the ocean always moving?
S12:Since changes in salinity and temperature affect water’s density,the water in the ocean is always moving.
Step Ⅲ Further Understanding and Language Study
T:Well done.I think you are very familiar with the the passage there are some words and expressions we should let’s look at the screen.I will give you some explanations about the words and expressions.
edibly adv. (extremely or unusually)
water is incredibly hot.
lable adj.(that can be used or obtained)
ets are available at the box office.
The book is available to all the students.
e vi.
range from A to B
r ages range from 25 to 50.
His interests ranged from chess to canoeing.
the way the water molecule…
e.g.I don’t like the way (in which/that) he looks at me.
They admired the way (in which/that) she dealt with the crisis.
is (to say) (which means)
e.g.A week later,that is,May 1 is her birthday.
He is a local government administrator,that is,he is a Civil Servant.
advantage of (make use of something well/make use of somebody unfairly)
took full advantage of the hotel’s facilities.
She took advantage of my generosity.
sensitive to something (affected easily by something)
is very sensitive to other’s words.
(Teacher writes the words,phrases and sentences on the blackboard.)
Step Ⅳ Listening and Reading Aloud
T:Let’s listen to the I play it for the first time,just listen to I play it for the second time,please listen and read the text you clear about that?
Ss:Yes.
(Te teacher plays the tape for the students to r listening,the teacher goes among the students and corrects any mistake the students make in pronunciation,stress and intonation.)
Step Ⅴ Summary and Homework
T:Today,we have read a passage about we know,it is very important to all the living we should do all we can to protect water from being addition,try your best to retell the passage in your own that clear?
Ss:Yes.
T:See you tomorrow!
Ss:See you tomorrow!
Step Ⅵ The Design of the Writing on the Blackboard
Unit 13 The water planet
The Second Period
Questions:
are the properties of water?
does the earth look like?
are different parts of the ocean?
can the ocean be compared to?
does the special air-conditioner-the ocean work?
are some examples of species in the ocean?
Words:incredibly,available
Phrases:range from A to B,that is,take advantage of,be sensitive to
Sentences:But the way the water molecule…
Step Ⅶ Record after Teaching
The Third Period
Teaching Aims:
ew Modal Verbs.
some exercises to review some important words learnt in the last period.
Teaching Important Point:
Review Modal Verbs.
Teaching Difficult Point:
How to help the students correctly use the Modal Verbs.
Teaching Methods:
ew method to help the students remember all the Modal Verbs they have learnt before and use them correctly.
vidual work or group work to make every student work in class.
Teaching Aids:
multimedia
blackboard
Teaching Procedures:
Step Ⅰ Greetings and Revision
(Greet the whole class as usual.)
T:Yesterday we learned a passage about water and now who can retell the passage in your own words?
S1:Let me try.
…
T:Well k you for your performance.
Step Ⅱ Word Study
T:Now please turn to Page at the first part of Word e are some words learnt in the last period,but the letters of these words are in the wrong I will give you a few minutes to put the letters in the correct order.
(A few minutes later,teacher may ask some students to spell their answers and give the Chinese meaning of each word to all the lly teacher writes the correct words on the blackboard.)
1 otmas atoms
2 tanomu amount
3 sdlio solid
4 oasbrb absorb
5 cgrnetidea centigrade
6 sag gas
7 nhroygde hydrogen
8 yoxgen oxygen
9 assm mass
10 fatol float
T:Good look at the screen and try to complete the following sentences by filling in the blanks with the proper first letter has been given and some words can be used more than you need,you can have a discussion with your partner.
(Teacher uses the multimedia to show the following sentences on the screen.)
water molecule is made up of two h_____ atoms and one o_____.
r is a l_____ at room temperature,but it turns into a s_____ when the temperature drops below 0℃ and into a g_____ when heated above 100℃.
a_____ is the smallest part of any living or nonliving thing.
es by the sea often have a s_____ climate that is never too hot or too cold,because water can a_____ and release a lot of heat.
can a______ water,so it helps keep water from flowing away.
ne scientists study the r_____ between living creatures and their habitat in the ocean.
water has a lower f______ point and is heavier than fresh water.
8. Oil has a density lower than 1000 kg/m3,so it will f______ on water.
(Teacher gives students enough time to prepare and then check their answers.)
Suggested answers:
ogen,oxygen id,solid,gas
dy,absorb
rb tionship
zing t
Step Ⅲ Grammar
T:Up to now we have learnt many modal can tell me what they are?
Ss:…
(Teacher asks some students to write their answers on the blackboard.)
Modal Verbs:
can/could,may/might,will/would,be able to,must,should,have to,need,shall,ought to,had better.
T:Very do you know how to use them?
S2:I know “should” can be used to give others some advice.
S3:I know when I want to borrow a book from my friend,I can use “may”.
…
T:Your answers are very e is a conclusion about modal verbs on the ’s look at it.
(Teacher uses the multimedia to show the conclusion on the screen.)
Modal Verbs:
Possibility:can/could,may/might
Ability:can/could,be able to
Requests:can/could,will/would,would like
Necessity:must,have to,have got to,need
Certainty:must,will,should
Permission:can/could,may/might
Suggestions:could may/might,shall
Advice:should,ought to,had better
T:From the chart we can see modal verbs can be classfied into eight groups by their you clear about the classification?
Ss:Yes.
T: look at the first part in sh the exercises according to the class fication of modal you need,you can discuss with your addition you’d better make it clear why you choose A、B、C,or you clear about the requirements?
Ss:Yes.
(Teacher gives students enough time to finish the deals with them with the whole class.)
T:Are you ready?
Ss:Yes.
T:’d like to tell me the answer to the first one?
S4:I think “A” is right.
T:Can you tell us the reason why you choose “A”?
S4:Because the speaker wants to express his/her g A、B、C and D,only A can be used to express request.
T:Very about the second one?
S5:“May” is right,I think,because the sentence is used to ask for permission.
T:Congratulations!Who can answer the third one?
S6:The phrase “wants to” express a state of being I think “C” is right.
T:Well ’s turn to do the fourth can try?
S7:I’m not sure,but I want to have a “C” right?
T:Why did you choose “C”?
S8:I think the first sentence expresses some necessity and the second one expresses guess.
S9:I don’t think use “must” can’t be used in negative sentences to express guess.
S8:Oh,I’m sorry.I forgot it.I see,the correct answer is “D”.
T:Excellent!
…
(Teacher encourages students to show their opinions about each one,and then teacher gives the correct answers and some necessary explanations.)
Suggested answers:
1.A 2.A 3.C 4.D 5.A 6.A 7.A 8.B 9.A
T:You have finished the first part let’s go on with the second you have confidence to finish it?
Ss: course we have.
T: is a letter from Mary to e John met some problems,so Mary wants to write a letter to help Mary doesn’t know how to use the modal verbs wants you to help her finish the re you finish the letter,read it to get the general idea of it first and then answer the questions on the screen.
(Teacher uses multimedia to show the questions on the screen.)
you tell from the letter what John’s problem is?
you agree on the advice that Mary gives to him?Why?What would be your advice?
(Teacher gives students a few minutes to read the letter,and then checks their answers to the questions.)
T:Who’d like to answer the first question?
S10:I want to have a my opinion,John’s problem is that his manager suspected him of stealing something at the meat factory.
T:Well you agree with him?
Ss:Yes.
T:What about the second one?
S11:I’d like to answer the question.I don’t agree to the advice that Mary gives to use if he finds another job,maybe it means that he really stole something at the meat factory.I think he should tell the manager that he didn’t do it and advise the manager to call in the police to make it clear.
S12:In my opinion,he’d better try to find out who is the real thief to prove that he didn’t do anything wrong.
…
T:I think your suggestions are all very helpful to John and I hope he can find a good way to deal with the you are clear about John’s ’s your turn to help Mary finish the e there are more than one answer for some you have some difficulties,you can discuss with your minutes later,I will check your answers.
Suggested answers:
can/will/should,may
not/might not,must,could/should,might/would,will,might/may/could/would,might,would/could/might,should,will
Step Ⅳ Summary and Homework
T:Today,we’ve reviewed some new words learnt in this particular,we have reviewed the usages of modal r class,do more exercises to master them is ’s all for you tomorrow.
Ss:See you tomorrow.
Step Ⅴ The Design of the Writing on the Blackboard
Unit 13 The water planet
The Third Period
Words:
atom,amount,solid,absorb,centigrade gas,hydrogen,oxygen,mass,float
Modal Verbs:can/could,may/might,will/would,need,must,have to,shall,should,ought to,had better
Step Ⅵ Record after Teaching
The Fourth Period
Teaching Aims:
ew the useful expressions learnt in this unit by practising.
ove the students’ reading ability by reading the material.
ove the students’ writing ability.
le the students to realize that it is important to protect the estuary.
Teaching Important Points:
ove the students’ reading ability by reading the material.
ove the students’ writing ability.
Teaching Difficult Point:
How to improve the students’ integrating skills-reading and writing.
Teaching Methods:
reading to go through the reading material.
ctive method to help students write a paragraph successfully.
Teaching Aids:
multimedia
blackboard
Teaching Procedures:
Step Ⅰ Greetings
Greet the whole class as usual.
Step Ⅱ Revision
T:Yesterday we did some practice about modal let’s do some more exercises to see if you have mastered se look at the screen.
(Teacher uses multimedia to show the exercises on the screen.)
Fill in the blanks using must/might/may/can/could and their negative forms.
1.-I saw Mary in the street yesterday.
-You ______ have seen is still in Australia.
2.-Could I use your bike?
-Yes,of course you ______.
ground is ______ have rained last night.
4.A machine ______ think for ______ be told what to do.
,don’t play with the valuable ______ break it.
Suggested answers:
’t ’t,must
Step Ⅲ Fast Reading
T:Good if we want to use the modal verbs correctly,we must practise them as often as y we will read another ocean is very important to all the living things,which is known to us,and I think we have also known about the reason why the ocean becomes so important-because of the properties of water,the ocean is very passage we will read is also about deals with “the body of water” you interested in the topic?
S1: what is the meaning of “the body of water”?I think water has no body.
T:Good question.I think you can get the answer to the question by let’s read the e you are reading,try to make clear what is the main idea of each des,try fast reading,it is helpful to improve your reading ability.
(Teacher gives students a few minutes to read the passage.)
T:Have you finished your reading?
Ss:Yes.
T:Wang Lin,are you clear about “the body of water”?
S2:Yes.I think “the body of water” means the main part of water.
T:You are great!Now who’d like to tell me the main idea of the first paragraph?
S3:An estuary is the body of water where a river meets the ocean.
T:Right,thank you for your about the second one?
S4:Let me general idea is that estuaries are great places for nature’s young.
T:Wang Ping,tell me the main idea of the third paragraph,please!
S5:I’m not sure.I think the third paragraph tells us estuaries are important to animals and plants,so we should try our best to protect them from environmental I right?
T:ratulations!There is only the last paragraph can try?
S6:I think the main idea of the last paragraph is that estuaries are also important to human beings because they not only provide recreation and education for us but also contribute to the economy.
Step Ⅳ Discussion and Explanation
T:The general idea of the passage is very clear to us let’s re-read the passage e you are reading,try to find out the answers to the questions on Page you need,you can have a discussion about I’ll check your answers.
(Teacher gives students enough time to read the the same time,teacher goes among them and helps them express their own opinions in English correctly.)
Suggested answers:
s provide energy for the ecosystem,and estuaries are protected from waves and storms by addition nutrients arrive in estuaries from both the land and the estuaries are great places for nature’s young ones.
ity means the quality of being other words,there are more living creatures than any other habitat on earth.
aries can make our water clean by absorbing nutrients and pollutants from water coming from inland sources.
function that estuaries can absorb pollutants and nutrients makes estuaries very sensitive to environmental pollution.
aries can provide recreation and education for human des estuaries also contribute to the they are very important to human beings.
T:Well you are very familiar with the passage.
To understand the passage better,I will explain some important se,look at the blackboard.
(Teacher writes the following phrases on the blackboard.)
ide…for
company will provide food and drink for them.
an opportunity to do something
e.g.I had no opportunity to discuss the problem with her yesterday.
3.a variety of
left for a variety of reasons.
There are a variety of patterns for you to choose from.
ribute to
work has contributed to our understanding of this difficult subject.
Step Ⅴ Writing
T:Up to now,we have learnt a lot about water and known the properties of water and importance of you are given an opportunity to check if you know a lot about at the questions on the screen.
(Teacher uses multimedia to show the questions on the screen.)
does an ice cube float?
will happen to a piece of metal if you put it in water?
do so many species live in estuaries?
have so many cities been built by estuaries?
T:Now imagine that your science teacher asks you to choose one of the questions and write a paragraph to explain what you learn from this unit and what you know about nature and science to write the must be careful to explain it to make your explanations easy to ’d better look at the tips on Page 24 before you ’s of great help to your writing.
Possible samples:
(Question 3)
Salt water from the ocean and fresh water from the river mix together in an mixing of fresh and salt water creats a unique enviroment filled with life of all ,animals can enjoy all the benefits of the oceans without having to face many of its dangers and nutrients arrive in estuaries from both the land and the there are so many species living in estuaries.
(Question 4)
Estuaries are great places for nature’s many cities are built by estuaries,we can enjoy fishing,swimming and having fun on the beach and scientists and students have endless opportunities to study a varety of life in the ’s more,estuaries also contribute to the economy through tourism and many cities have been built by estuaries.
Step Ⅵ Test
T:In this unit,we’ve learnt some important I’ll give you a test to check whether you’ve mastered them or at the screen,please.
(Teacher uses multimedia to show the test on the screen and gives students a few minutes to finish checks their answers.)
children’s age ______(在5岁至15岁之间).
2.______(她处理这个问题的方法) is very good.
3.A week later,______（也就是),Oct 1 is National Day.
______(充分利用了) multimedia in the class.
little girl ______(对温度很敏感).
actions ______(使他受到尊敬).
______(设法完成了工作) with very little help.
Suggested answers:
e from 5 to 15
way she deals with the problem
is
advantage of
very sensitive to temperature
him respected
ged to get the work done
Step Ⅶ Summary and Homework
T:Today,we’ve done some reading and ’ve also reviewed some useful expressions in this r class,go over all the important points we have learnt in this ’s all for s is over.
Step Ⅷ The Design of the Writing on the Blackboard
Unit 13 The water planet
The Fourth Period
Phrases:provide…for,have an opportunity to do,a variety of,contribute to
Step Ⅸ Record after Teaching
The Fifth Period
Modal Verbs
Teaching Aims:
ew the important usages of modal verbs.
up the different situations of modal verbs.
Teaching Important Point:
How to use modal verbs correctly.
Teaching Difficult Point:
How to choose modal verbs correctly.
Teaching Methods:
ew method to master the important usages of modal verbs.
ctive method and comparative method to master the important and difficult points.
Teaching Aids:
multimedia
blackboard
Teaching Procedures:
Step Ⅰ Greetings
Greet the whole class as usual.
Step Ⅱ Revision
T:In this unit,we have done some practice about modal we know,modal verbs have several points in common which make them quite different from other ,please discuss the points in common among modal verbs in groups of r a while I will check your answers.
(Teacher gives students enough time to discuss,and then collects their answers and sums them up.)
Modal Verbs:
l verbs are used when we say that we expect things to happen or that things are possible,or necessary,or impossible,or improbable,or when we describe things that didn’t happen,or that we are not sure whether they happened.
l verbs have no -s on the third person tions and negatives are made without “do”.
l verbs have no infinitives.
l verbs have no past forms.“Could” and “would” are used with past meanings in some cases.
l verbs can be used with perfect infinitive to talk about things which didn’t happen,or which we’re not sure about.
Step Ⅲ Revision of the Important Usages of Modal Verbs
T:Good we all know,modal verbs can be classified into eight groups according to their y we will review some important usages of modal tly,let’s review the modal verbs that can be used to express “possibility”se tell me which modal verbs can be used to express “possibility”.
Ss:Can/could/may/might all express “possibility”.
T:When they express “possibility”,they are not quite the same.“Can” is used to talk about theoretical we want to talk about the actual chances of something happening,or being true,we use “could/may/might”des,“can” is sometimes used to talk about present “possibility”,but only in questions and negative that clear?
Ss:Yes.
T:Now,let’s do some exercises to master them at the screen and try to finish the sentences as soon as possible.
(Teacher uses multimedia to show the sentences on the screen.)
Fill in the blanks using can/could/may/might.
d you like to answer the phone?It ______ be your sister.
part of the country ______ be very warm in September.
3.______ it be Lily?
______(not) be true.
______ be right.
Suggested answers:
d/may/might ’t
T:Besides “possibility”,can/could/may/might are also used to express “permission”?
Ss: we are not sure about how to use them.
T:It doesn’t matter.I will give you some explanation.“Can” is the commonest one of the four,and “could” is rather more hesitant than “can”.“May” and “might” are used in a more formal often suggest respect.“Might” is more hesitant and is not very des,when we give permission,we usually use “can” and “may”,but not “could” and “might” we report permission,“may” is not usually you clear about it?
Ss:Yes.
T:Then try to finish the following exercises,please.
(Teacher shows the exercises on the screen.)
1.-______I use your phone?
-Yes,of ______.
2.______ you come into the meeting room without showing a passport?
said that I ______ borrow her car.
Suggested answers:
;can/may
t/could（“Might” and “could” can be used after a past verb.)
T:Next,which modal verbs do you think are necessary to review?
Ss:The modal verbs expressing “necessity” are very important.
T:Yes,I agree with can use “must/have to/have got to/need” to express “necessity” about how to use them,I want you to review them by understanding the following sentences by at the sentences on the screen.
(Teacher shows the sentences on the screen,and then asks some questions.)
1.I really must study hard.
must be here by 3 o’clock.
have (got) to go and see the manager.
needn’t work on Sundays.
T:From the sentences,who can tell me the difference between “must” and “have to”?
S1:I want to have a “must” is used,the necessity comes from the the necessity comes from “outside”,“have (got) to” is more common.
T:Congratulations!Do you know how to use “need”?
S2:I think in negative sentences,“don’t need to”,“needn’t” or “don’t have to” is used to say that there is “no necessity”.
T:Please give me an ?
S2:I know the reason why you were needn’t try to explain.
T:Thank addition,I want to tell you “have got to” is used instead of “have to” in informal that clear?
Ss:Yeah.
T:Now look at the blackboard.(Write the following on the blackboard.)
must have rained last night,for the ground is wet.
can’t have seen him yesterday,for he is still in Australia.
could have told me he was coming.
is very may have missed the bus.
T:These sentences have something in can tell me what it is?
Ss:The modal verbs in these sentences are used together with perfect infinitives.
T:Very let’s review the modal verbs used together with perfect infinitives.
S3:When should we use modal verbs together with perfect infinitives?
T:When we talk about the past,we can use the structure,but it has a special is used for speculating(thinking about what possibly happened) or guessing (thinking about how things could have been different) you got it?
Ss:k you.
T:Now let’s do some exercises to consolidate the usage of the structure.
1.I told Sally how to get there,but perhaps I ______for her.
to write it out
be have written it out
ld have written it out
t to write it out
didn’t let me we ______ in turn,you ______ so tired.
e;didn’t get
e;wouldn’t get
driving;wouldn’t get
driven;wouldn’t have got
3.-I want to know why she is late.
-She ______ the early bus.
d miss
have missed
have missed
t miss
4.-I stayed at a hotel in New York.
-Oh,did you?You ______ with Barbara.
d have stayed
d stay
d stay
have stayed
light is still ______ to turn it off when he ______ the room.
forget;leave
have forgotten;left
forget;have left
d have forget;left
(Teacher shows the exercises on the screen and gives students enough time to finish them,and then checks their answers and gives them some necessary explanation.)
Suggested answers:
1.C 2.D 3.C 4.A 5.B
T:Now,it’s turn to review modal verbs expressing “advice”’d like to tell me which modal verbs we can use to express “advice”?
S4:I think we usually use “should/ought to/had better” to give “advice”.
T: most cases,both “should” and “ought to” can be used with more or less the same ver,there is a very slight we use “should”,we give our own subjective opinion.“Ought to” had a rather more objective force,and is used when we are talking about laws,duties and you clear about that?
Ss:Yes.
T:Who wants to give us an example using “should” and “ought to” expressing “advice”?
S5:People ought to vote even though they don’t agree with any of the candidates.
T:Well about “should”?
S6:Let me should see “Hero”-it’s a great film.
T:Thank you for your good you know how to use “had better”?
Ss: we use “had better”,we don’t usually mean that the action recommended would be better than another simply mean that he/she ought to do it.
T:Please make up a sentence using “had better”.
S7:You’d better hurry up,if you want to get to the factory on time.
T:Good example!
Step Ⅳ Summary and Homework
T:Up to now,we have reviewed modal verbs which express possibility,necessity,permission,advice and modal verbs used together with perfect are all very r class,try to do more exercises to master them ’s all for you tomorrow.
Ss:See you tomorrow.
Step Ⅴ The Design of the Writing on the Blackboard
Unit 13 The water planet
The Fifth Period
Modal Verbs
must have rained last night,for the ground is wet.
can’t have seen her yesterday,for she is still in Australia.
could have told me he was coming.
is very may have missed the bus.
Step Ⅵ Record after Teaching
