表推测的情态动词

情态动词从小学讲到了高中。反反复复。很多同学觉得老师的这种老生常谈是浪费时间的一种表现。他应该为我们讲解一些标新立异的知识。事实上你练这些老生常谈的知识掌握的都不靠谱，又有什么信心去学习新的知识呢。所以就情态动词的用法在这小编要为大家在唠叨一遍讲讲表推测的情态动词。

1. 肯定的推测一般用must, should, may(might)或could(不用can)，其中，must的语气最强，译为“肯定”、“准是”、“想必是”;should的语气次之，译为“很可能”、“应该”，指按常理推测;may(might)，could的语气最弱，译为“也许”、“可能”。

①Helen _______ go on the trip with us but she isn't quite sure yet.

A. shall B. must C. may D. can

②—I've taken someone else's green sweater by mistake.

—It ___ Harry's. He always wears green.

A. has to be B. will be C. mustn't be D. could be

③I have lost one of my gloves. I _______ it somewhere.

A. must drop B. must have dropped

C. must be dropping D. must have been dropped

④If I ____ plan to do anything I wanted to ,I'd like to go to Tibet and travel through as much of it as possible.

A. would B. could C. had to D. ought to

2. 否定推测分为两种情况：

1)语气不很肯定时，常用may not, might not或could not，译为“可能不”、“也许不”。

You might just as well tell the manufacturer that male customers ______ not like the design of the furniture.

A. must B. shall C. may D. need

2)否定语气较强时，则用can't，译为“根本不可能”、“想必不会”，表示惊异、怀疑的感情色彩。

①—Do you know where David is? I couldn't find him anywhere.

—Well. He ______ have gone far——his coat's still here.

A. shouldn't B. mustn't C. can't D. wouldn't

②— Isn't that Ann's husband over there?

— No, it _______ be him I'm sure he doesn't wear glasses.

A. can't B. must not C. won't D. may not

3. 疑问句中的推测，往往用can或could。

Mr. Bush is on time for everything. How ______ it be that he was late for the opening ceremony?

A. can B. should C. may D. must

4. 对已发生事情的肯定推测常用“must, may, might等+完成式”;否定推测常用“can, could, may, might等+完成式”。

①I was on the highway when this car went past followed by a police car. They _______ at least 150 kilometers an hour.

A. should have been doing B. must have been doing

C. could have done D. would have done

②He _______ have completed his work; otherwise, he wouldn't be enjoying himself by seaside.

A. should B. must C. wouldn't D. can't

③—Tom is never late for work. Why is be absent today?

—Something ________ to him.

A. must happen B. should have happened

C. could have happened D. must have happened

④ My sister met him at the Grand Theatre yesterday afternoon, so he_____ have attended your lecture.

A. couldn't B. needn't C. mustn't D. shouldn't

情态动词是作为特殊动词的一种有很多的用法。其中情态动词表示推测就是情态动词用法的一个变相特殊用法。而情态动词表推测在不同的句子用的情态动词是不一样的。以上就悉数不同句中表推测的情态动词和相关的练习题。假如你还分不清句中表推测的情态动词，希望学大的这篇资料可以为你排忧解难。