(2) This cake is very sweet. You ______ a lot of sugar in it. (2005辽宁卷)
A. should put B. could have put C. might put D. must have put
分析:答案选D。前文说蛋糕很甜,下文的语境显然应该是你一定是在里面放了很多糖,故用must+完成式表示对过去情况的肯定推测。
(3) The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
Oh, dear! She ______ a lot of difficulties! (2005江苏卷)
A. may go through B. might go through
C. ought to have gone through D. must have gone through
分析:答案选D。由上文的stayed可知,此题是对过去情况有把握的肯定推测。句意为那个女生物学家呆在非洲研究野生动物13年才回来。天啊!她一定经历了不少苦难!
3.注意分清适用句型
即要分清所考查的情态动词是用于肯定句型,还是用于疑问句型或否定句型,同时还要注意情态动词在某些特殊情况下所使用的特殊句型。如:
The World Wide Web is sometimes jokingly called the World Wide Wait because it _____be very slow. (2005浙江卷)
A. should B. must C. will D. can
分析:答案选 D。在通常情况下,情态动词 can 表示推测时,只用于否定句和疑问句,不用于肯定句,但有一种特殊情况就是它可以用于肯定句中表理论上的推测或表示有时之意,而此题考查的正是can 表示有时的用法。 高中英语语法:情态动词的做题技巧
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