热点七:情态动词
[热点透视] 情态动词表推测的用法;情态动词的完成时。
[难点剖析] must\can’t\shouldn’t\needn’t\ought to\etc.+ have done 的意义及用法;shall 用于二、三人称表允诺,命令,警告,强制等;must, can, may表推测用法见下表。
表三
单词 用法
must 用于肯定句中,肯定语气最强。must not表“禁止”。
can 不用于肯定句中,肯定语气次之。若用于肯定句中,表偶尔一时的特征。can’t表“不可能”。
may 用于肯定句中,肯定语气最弱。may not表“可能不”。
[考题盘点]
24.(03-28) A left-luggage office is a place where bags ______be left for a short time, especially at a railway station.
A. should B. can
C. must D. will
此题考查can表可以、能够的用法,故选B。
25.(04-29) — 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
can’t 表不可能,语气肯定,破折号加以注释,据题意,选A。
[备考策略]①考生应熟练掌握情态动词used to\would表过去常常的区别;can\may表许可的区别;should\ought to表应该的区别;could\be able to表能力的区别。
②侧重于情态动词表推测的用法和情态动词的完成时。
[过关训练]
26. (辽04-29) —Mum, I’ve been studying English since 8 o’clock. _____I go out and play with Tom for a while?
— No, I’m afraid not. Besides, it’s raining outside now.
A. Can’t B. Wouldn’t
C. May not D. Won’t
27. (浙04-26) I ____pay Tracy a visit, but I’m not sure whether I will have time this Sunday.
A. should B. might
C. would D. could
Key A A