2013年成人英语三级语法精选讲义
(四)情态动词
情态动词用来表示能力、允许、许诺、可能、劝告、意愿等概念或态度。情态动词无人称变化，在句子中和动词原形一起构成谓语。从这几年的考试看，着重测验情态动词接完成时的用法，尤其是与虚拟语气结合来考查学生的掌握情况。另外情态动词表推测也成为今年考查重点，须引起重视。
1.must+完成时 表示对已发生的事情的一种肯定的猜测
例1 Since this road is wet and slippery this morning，it ____ last night.
A.must rain B.was raining C.must have rained D.may rain
【答案】C(2004年11月35题)
例 2 I believe he ____ an accident，otherwise he would have arrived on time.
A.would have had B.could have had C.should have had D.must have had
【答案】D(2001年58题)
例3 Mr.Green ____ my letter，otherwise be would have replied before now.
A.must have received B.must have failed to receive C.must receive D.must fail to receive
【答案】B(1998年44题)
例4 She ___ be ill because I saw her playing tennis just now.A.can′t B.could′t C.mustn′t D.may not
【答案】A(2005年10月20题)
2、should(ought to)+完成时 表示应该做的事情而没有做，否定式表示不该做的事情做了。含有对
过去的动作的责备、批评。
例1 You ought ____ the matter to the manager the day before yesterday.
A.oughtn′t to go B.hadn′t gone C.shouldn′t have gone D.mustn′have gone
【答案】C(2006年11月30题)
例2 You ought ____ the matter to the manager the day before yesterday.
A.to report B.to have reported C.to reporting D.have reported
【答案】B(2003年11月36题)
例3 I′m sorry I couldn′t get in touch with him before be left，I ____ him earlier.
A.had a telephone B.have phoned C.should have phoned D.should be phoned
【答案】C(2000年26题)考 易网提供
2.could/might + 完成时 表示能做的事情而没有做。表示对过去能做而未做的事情感到惋惜、遗憾。
例1 He could have joined us，but he didn′t get our invitation in time.
他本来能够和我们在一起，但是他没有及时收到我们的请柬。
例2 He might have given you more help，but he was busy then.
他本来可以给你更多帮助的，但他那时很忙。
例3 He abandoned a career that _____ to his becoming one of the most influential people in the world.
A.could have led B.would lead C.should have led D.must lead
【答案】A(2005年11月33题)
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