情态动词表示推测

2.may/might have done(表可能性推测)可能,也 许
3.should/ought to have done(表本该做而实际未做的事
shouldn’t/oughtn’t to have done (表本不该做而实际
已做的事)
4.needn’t have done(表本不必做而实际己做,造成浪,
You should hav但e 实co际me上e并arl没ier有, o发th生erwise you would have met him.
你本该早点来，否则的话，你就会遇见 他．（实际上没有早来，也没见到他）
must表推测的反意疑问句: 反意问句部分永远不带must.
1.She must be a teacher,isn’t she? 2.She must have gone to Shanghai,
It must have rained last night,for the road is wet.(It can’t/couldn’t have rained last night.)
1.It must have rained last night.for the ditch(水道,渠道) is full of water.
hasn’t she? 3.She must have gone to Shanghai
yesterday, didn’t she?
特殊疑问句 疑问词+do you
(插入语)
Think suggest believe imagine suppose say
+主语+谓语
gone to Britain.(不可能是) 2.We may be late for class.It’s already
seven to five.(也许) 3.You mustn’t play with fire!
另外,在虚拟语气中还有:
would have done… 表示“本来会….． ”
2.---Can it have been a comfortable journey?
3.Ten passangers were in a car!It can’t have been a comfortable jurnery.
4.He may have gone to Beijing yesterday. (可能性大)
情态动词表示推测的用法
1.对现在(事情)推测 2.对过去(事情)推测
must +v. (肯定) might/could/may/can +v. (可能) cLeabharlann Baidun’t+v. (不可能)
1.must have done (表肯定性推测) “肯定,准是,”
can’t /couldn’t have done (表否定性推测)“不可能”
费,遗憾,不好后果)
情态动词表示推测的用法
1.对现在(事情)推测： must + v. (肯定)
may/might/could/can+v. (可能)
（情态动词+ 动词原形） can’t + v. (不可能)
2.对过去(事情)推测：（情态动词+ 完成式）
must have done (表肯定性推测) “肯定,准是,” can’t /couldn’t have done (表否定性推测)“不可能”
5He might have gone to Beijing yesterday. (可能性小)
6.There was plenty of time.She needn’t have hurried.
7 You should have come to the meeting.
1.--- He must be Mr. Li.(肯定是) ---No,he can’t be Mr. Li. Mr.Li has