need的过去式和过去分词形式

The place needed a good spring clean before we could move in.

那地方得来个大扫除，然后我们才能搬进去。

He needed to be taken down a peg or two.

Considerable modification of the existing system is needed.

需要对现有的系统进行相当大的.改进。

He argued that they needed more time to finish the project.

他提出理由说明他们需要更多的时间来完成该项目。

A special code is needed to override the time lock.

这定时锁要用特定密码才能打开。

No conversion from analogue to digital data is needed.

没有必要把模拟转换为数字数据。

They needed to make up ground on their competitors.

他们必须穷追猛赶竞争对手。