1.用介词或介词短语表明虚拟条件
常用的介词或介词短语主要有without(没有),but for(要不是),in the absence of(假如没有)或were it not for(要是没有),but that(假定……不)等。
Example:
It ______ better to think independently.
a. goes b. looks c. would be d. shall be
3.经过上下文表明虚拟条件
常用的连接词有or, otherwise, but等。例如:
I was very busy yesterday. Otherwise I would have come to see you.
The worn parts have been replaced at the proper time, or a damage might have happened.
磨损的部件及时更换了,不然就会发作损坏。从句谓语动词要用过去式。例如:
I had hoped that she would answer my letter.
We had hoped that you would change your mind.
His father had hoped that he would be a scientist.
Example:
Tom’s father had hoped that he ______ into business with him.
a. would go b. would have gone
c. went d. had gone
6.虚拟语气用在had better, had best, had rather, would sooner, would rather, would have句型中,后接原形动词