情态动词表推测用法总结(整理稿)
情态动词表推测用法总结

能用于表推测的情态动词:must, can, could, will, would, may, might, should, ought to
1.在肯定句中一般用must (一定),may(可能),might / could(也许,或许)。 (1)He must/may/might know the answer to this question?
他一定/可能/也许知道这个问题的答案。
(2)It is cold in the room. They must have turned off the heating.
屋里很冷,他们肯定把暖气关了。
2.否定句中用can’t / couldn’t(不可能), may not/might not(可能不)。 (1)It can’t/couldn’t be the headmaster. He has gone to America.
这不可能是校长,他去美国了。
(2)He may not/might not know the scientist.
他也许不认识那位科学家。
3.疑问句中用can/could (能 ?)。
(1)Could he have finished the task?
他可能把任务完成了吗?
(2)Can he be at home now?
他现在能在家吗?
注:以上三种句式中情态动词的语气按程度都是依次递减的。Might, could并非may, can的过去式,而表示语气较为委婉或可能性较小。

1.

(1)She must / may / might / could arrive before 5.
5:00前她一定/可能/也许到。
(2)She must/may/might/could walk miles and miles among the hills without meeting anyone. 她一定/可能/也许会在山里一连走好几英里而遇不到一个人。
2.




(1)He must / may / might / could be listening to the radio now.
他一定/可能/也许正在听收音机。 (2)He can’t ( couldn’t ) / may ( might ) not be at home at this time. 这个时候他不可能/可能不在家。 (3)Mr. Bush is on time for everything .How

can ( could ) he be late for the opening ceremony ? 布什先生一向准时,这次开幕式他怎么可能迟到呢?
3.
(1)It must / may / might / could have rained last night .The ground is wet.


