Unit 1 Cultural relics language_points课件(新人教必修2)
Unit 1 Cultural relics language_points课件(新人教必修2)第3页

1. Frederick William I, the king of Prussia, ____ never _____________ that his greatest gift to the Russian people would have such an amazing history.

could have imagined

情态动词+ have done

I may have seen the film but I’m not sure. It must have rained last week. I should have told you earlier. You shouldn’t have cheated in exams. You needn’t have bought such a dear watch for her. It wasn’t a long way, we could have walked there.

can’t/couldn’t have done 一定没做(对过去情况的推测,语气较肯定,疑,否句中)

may(might) have done 可能做了(对过去情况的推测)

must have done一定做了(过去情况的推测,语气较肯定,肯定句中

should/ought to have done本该做而没做(对已发生事情的批评责怪

shouldn’t/oughtn’t to have done本不该做但是做了(同上)

needn’t have done本不必做但是做了(对已发生事情的批评责怪)

could have done本可能做而没能做(对已发生事情的后悔,遗憾)