例8:A left-luggage office is a place where bags ____ be left for a short time, especially at a railway station. (2003全国卷)
A. should B. can C. must D. will
例9:The World Wide Web is sometimes jokingly called the World Wide Wait because it ______be very slow. (2005浙江)
A. should B. must C. will D. can
分析:can 表示推测时常用于疑问和否定句中,用于肯定句中常常表示理论上的可能性,用来表达事件或情况可能发生(但并不牵涉到是否真的会发生)。故答案分别为B、D。
二、考查情态动词的推测用法
1、对现在或客观事实的推测
对现在或客观事实的肯定推测一般用must, will, should, may(might)或could,语气依次递减。
例10:Helen _____go on the trip with us but she isnt quite sure yet. (2005安徽)
A. shall B. must C. may D. can
例11:Ive taken someone elses green sweater by mistake.
It ___ Harrys. He always wears green. (2005广东)
A. has to be B. will be C. mustnt be D. could be
例12:That, I think, ____ be all that I want to say.
A. can B. could C. will D. ought to
分析: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)译为也许、大概,表示把握不大的推断,后面常跟but。could的语气最弱,译为也许、可能。答案分别为C、D、C。
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