为备考英语六级的同学们整理了英语六级听力口语关键句，但愿可以为大家带来协助，预祝大家高分通过大学英语六级考试
12 月大学英语六级听力口语关键句汇总 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，表达对过去状况的假设
考点归纳 “情态动词+目前完毕时”句型的使用方法诸多
如： must have+done sth
表达对过去也许发生的事情的推测，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，不过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，不过当时太忙了
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，不过其实没有必要穿这样多
ought to/should have done sth
表达“本应当做某事，而实际上并没有做”
否认句表达“不该做某事而做了”
如： 1) You ought to have been more careful in this experimen
