do 和does 怎么用

英语中do是动词原形，用于第一人称、第三人称的复数(I/you/we/they)does用于第三人称单数(he/she/it)does用于第三人称单数。

do造句

Do it yourself ─ I don't have time.

你自己做吧——我没时间。

I could do it now, if you like.

如果你愿意的话，我现在就可以做这事。

What in the world did they think they were doing?

他们到底认为自己在做什么？

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。

One major problem did present itself, though.

不过，确实出现了一个重大问题。