would是一个助动词，或者叫做情态动词，它有两种用法：第一种用法叫would do，普通的过去将来时指的是在当时的时候将来要发生的事。另外一个用法是虚拟语气，would do、would have done，这些都是虚拟语气。

扩展资料

A change of job would do you the world of good.

换一下工作会对你大有好处。

He would do well to concentrate more on his work.

他最好还是更加集中精力在工作上。

It was a chance meeting that would change my life.

那次偶然的会面改变了我的一生。

Nothing, but nothing would make him change his mind.

没有什么绝对没有什么会使他改变主意。

Someone might find out, and that would never do.

也许有人会发现，那是绝对不行的。

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