Your hair wants cutting
The book is worth reading
The floor requires washing.
2.need既可以用need to be done 也可以使用need doing ,两种形式都表达被动的意义
The house needs painting= the house needs to be painted.
The watch needed repairing= the watch needed to be repaired. 情态动词
一.情态动词的现在完成式的用法
情态动词现在完成式主要有两个功能:表示已经发生的情况和表示虚拟语气。在这两个方面must/mustncan/cannneed/neednmay/maynmight/mightnshould/shouldn
ougtht等情态动词+完成式表示的意思是有一定区别的
1.表示已经发生的情况。
1)must have+过去分词,表示对已发生情况的肯定推测,译为(昨天)一定。如:
My pain apparent the moment I walked into the room, for the first man I met asked sympathetically: Are you feeling all right?
[A] must be [B] had been [C] must have been [D] had to be
(答案为C)
2)cant / couldnt have+过去分词,表示对已发生情况的否定推测,译为(昨天)一定没。如:
Mary my letter; otherwise she would have replied before now.
[A] couldnt have received [B] ought to have received
【高中英语语法 情态动词的用法】相关文章:
最新
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29