2019年6月大学英语六级听力口语关键句(83)
I couldn't have won the award without your assistance.
点睛
couldn't have won意为“本来不会赢”,是虚拟语气的一种,表示对过去情况的假设。
考点归纳
“情态动词+现在完成时”句型的用法很多。如:
must have+done sth. 表示对过去可能发生的事情的推测,意为“肯定”。如:
Mary has gone to work, but her bicycle is still here. She must have gone by bus. 玛丽已经去上班了,但是她的自行车还在这儿。她一定是坐公共汽车去的。
would like to have done sth. 意为“本打算做某事”。如:
I would like to have read the article, but I was very busy then. 我本来想读一读那篇文章,但是当时太忙了。
needn't have done sth. 意为“本没必要做某事”。如:
I dressed very warmly for the trip, but I needn't have done so. The weather was hot. 为了旅行,我穿得很暖和,但是其实没有必要穿这么多。天气比较热。
ought to/should have done sth. 表示“本应该做某事,而事实上并没有做”。否定句表示“不该做某事而做了”。如:
1) You ought to have been more careful in this experiment. 在做这个试验的时候,你本应该更细心一些。
2) He ought not to have thrown the old clothes away. 他本不该把那些旧衣服扔了。
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