would 將
should 應(yīng)該
might 也許
could 可能
have done 已經(jīng)做了
have done 可以加在前面四個(gè)單詞后面,表示過去將來時(shí)
I would have done my homework if you didn't call me.
如果你沒給我打電話,我已經(jīng)做完作業(yè)了.
You should have done your homework before coming here.
你來之前應(yīng)該做完作業(yè)的.
He might have seen that before.
他之前也許看過了.
They could have called us.他們可能給我們打過電話了.