以a开头的形容词只能做表语

例句：

People are still terribly apprehensive about the future.

人们对于将来仍然非常担心。

She was apprehensive about her son's safety.

她很担心儿子的安全。

The book was written in a style appropriate to the age of the children.

这本书的文体适合儿童阅读。

Jeans are not appropriate for a formal party.

正式聚会上穿牛仔裤不合适。

he has access to all manner of arcane knowledge that even I do not.

她知道各种神秘的知识，很多我都没听说过。