中考英语情态动词的推测用法

如题所述

第1个回答  2011-03-25
must be表推测的时候表示有某种迹象可以断定,可能性较大,比如: he must be at home, for his car is stopping here.
may be表推测的可能性较小
否定的话只能用can't
第2个回答  2011-03-25
情态动词的用法:表示"可能"或"预测"
(Can,Could,Will,Would,Shall,Should,Must,Ought to)
以下是这些词的用法,总结的挺好的,希望对你有所帮助。
A. can 和 could 用于表示"可能"或"预测":

1. He can't be at home. (否定句)
他不可能在家。

3. Anybody can make mistake. (只表示理论上的可能性)
任何人都可能犯错误。

4. At that time we thought the story could not be true. (表示过去的可能性)
那时我们认为所说的故事不可能是真的。

5. An accident can happen if you do this. (表示事情肯定会发生)
如果你这样做,可能会发生意外。

B. may 和 might 用于表示"事实上的可能性"或"预测":

1. It may rain tomorrow. (表示可能会发生)
明天可能会下雨。

2. It may snow later this afternoon. (表示预测)
今天下午可能会下雪。

3. You might be right. (表示有可能)
你可能是对的。

4. It is possible he may have called while we were out. (现在完成式型may
have called)
当我们出门后,他有可能会打电话来。

5. Sam might have taken the money, but it seems unlikely. (过去完成时might have taken)
钱可能会是Sam拿走的,但又不太像。

6. If you took some exercise, you might not be so fat. (might 用于条件句)
要是你锻炼锻炼,可能不会这样胖。

7. Electric irons could be dangerous; they might give you a severe shock.
(这里的might表示可能性比may 小一些)
电熨斗会有危险的,它可能使你受到严重的电击。

C. will 和 would 用于表示"预测"或"习惯性":

1. I think he will be all right now. (will be 表示一定会)
我想他现在一定好了。

2. That would be his mother. (would be 表示肯定是)
那肯定是他母亲。

3. He will sit there hour after hour looking at the river. (will 表示经常
的)
他经常一连几个小时坐在那儿看着河水。

4. He would come to see me when he was in London. (would 表示习惯地)
他在伦敦时,常来看望我。

D. shall 和 should 用于表示"必定":

1. I shall be rich one day. (shall be )
总有一天我发达的。

2. That should be Sam and his mother. (should be)
那准是Sam 和他的母亲。

E. must 用于表示"必定","必会":

1. This must be good for you. (must be 肯定推测)
这肯定对你是有益的。

2. All mankind must die. (表示必然会发生的事)
所有的人一定会死的。

3. Mustn't there be a mistake ? (mustn't 多用于疑问句)
那肯定会有错误吗?

F. ought to 用于表示"想必会"(语气较must 弱):

1. They ought to be there by now.
他们想必已到那儿了。

2. He ought to stop smoking.
他最好不要抽烟了。本回答被提问者采纳
第3个回答  2011-03-25
简单地说,表示肯定的推测用must,表示否定的推测用can't。例如:
1.Tom must be at home. The light in his room is on.
汤姆肯定在家里,他房间里的灯亮着呢。
2.The man can't be Mr Li. He has gone to Japan and he will come back next Monday.
那人不可能是李先生,他去日本了,将在下周一才回来。
多做题的前提下,要善于总结提高。
祝你学习快乐。