1.I________to my cousin’s birthday party last night，but I was not available. (2013·安徽，28)
A.went B.had gone
C.would go D.would have gone
答案 D
解析 2.It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words.(2013·安徽，34)
A.may B.couldn’t
C.should D.needn’t
答案 B
解析 3.I should not have laughed if I________you were serious.(2013·江苏，30)
A.thought B.would think
C.had thought D.have thought
答案 C
解析 考查虚拟语气。句意为：如果我当时想到你是认真的，我就不会笑了。由句意知，此句是与过去事实相反的虚拟语气，故从句结构为had done。
4.—Why are your eyes so red?You________have slept well last night.
—Yeah，I stayed up late writing a report.(2013·四川，5)
A.can’t B.mustn’t
C.needn’t D.won’t
答案 A
解析 5.My mom suggests that we ________ eat out for a change this weekend.(2013·陕西，12)
A.should B.might
C.could D.would
答案 A
解析 句意为：母亲提议这个周末出去吃饭换换口味。suggest(建议)接宾语从句时谓语动词用(should)do。
6.Since nobody gave him any help，he ________ have done the research on his own.(2013·大纲全国，26)
A.can B.must
C.would D.need
答案 B
解析 7.If we________a table earlier，we wouldn’t be standing here in a queue.(2013·北京，34)
A.have booked B.booked
C.book D.had booked
答案 D
解析 考查虚拟语气。句意为：如果早些预订饭桌，我们现在就不会站在这儿排队了。if从句是对过去情况的假设，故用过去完成时态。
8.—You needn’t take an umbrella.It isn’t going to rain.
—Well，I don’t know.It________do.(2013·北京，35)
A.might B.need
C.would D.should
答案 A
解析 考查情态动词用法。句意为：——你不必带伞。天不会下雨。——我不知道，可能会下雨吧。might“可能”，表推测，且可能性较小。
9.Harry is feeling uncomfortable.He________too much at the party last night.(2013·辽宁，31)
A.could drink B.should drink
C.would have drunk D.must have drunk
答案 D
解析 10.No one________ be more generous;he has a heart of gold.(2013·天津，9)
A.could B.must
C.dare D.need
答案 A
解析 考查情态动词。句意为：没人比他更慷慨;他有一颗金子般的心。“No one could be more generous”是否定词和比较级连用，表达最高级含义，A项could可以在否定句中表示推测，为正确答案。B项表推测，只用在肯定句中;dare和need不符合句意。
11.If he had spent more time practising speaking English before，he________able to speak it much better now. (2013·天津，14)
A.will be B.would be
C.has been D.would have been
答案 B
解析 考查虚拟语气。句意为：如果以前他花更多时间练习说英语的话，现在他英语就会说得好多了。由从句中的had spent可知从句与过去事实相反;由主句中的now可知主句与现在事实相反，故用would be。本题实际上是考查错综时间的虚拟语气。
12.He________sleep，although he tried to，when he got on such a hunt for an idea until he had caught it.(2013·湖南，32)
A.wouldn’t B.shouldn’t
C.couldn’t D.mustn’t
答案 C
解析 考查情态动词的辨析。wouldn’t不会;shouldn’t不应该;couldn’t不能;mustn’t禁止。根据语境可知，他显然是“不能”入睡，根据句中的although he tried to可知这里说的是过去的事情，所以用cannot的过去式。
13.I ________ myself more—it was a perfect day.(2013·浙江，3)
A.shouldn’t have enjoyed B.needn’t have enjoyed
C.wouldn’t have enjoyed D.couldn’t have enjoyed
答案 D
解析 句意为：我那时玩得再高兴不过了——那真是完美的一天。couldn’t have done不可能做过。此处用not和比较级连用表达最高级的含义，意为“从未比这更高兴过”。故选D项。
14.Eye doctors recommend that a child’s first eye exam ________ at the age of six months old.(2013·浙江，8)
A.was B.be
C.were D.is
答案 B
解析 recommend建议，其后常接that 引导的宾语从句，而宾语从句中要用sb.should do或者sth.should be done的形式，should常可省略。 故本题应选B项。
15.—Do you think George has passed the driving test?
—No.If so，he ________ his car to our college yesterday.(2013·福建，30)
A.would drive B.drove
C.would have driven D.had driven
答案 C
解析 句意为：——你认为George已经通过驾照考试了吗?——没有。如果通过的话，昨天他就会开车来我们的大学了。本题表达的是对过去事实的假设，句子结构为：If...had done...，...would(might，could，should) have done...。
16.When I was a child，I ________ watch TV whenever I wanted to.(2013·江西，29)
A.should B.could
C.must D.need
答案 B
解析 本题考查情态动词。should应该;could能够，可以;must必须;need需要。句意为：当我还是个孩子的时候，我想看电视的时候就可以看。根据句意可知，B项符合题意。
17.—It rained cats and dogs this morning.I’m glad we took an umbrella.
—Yeah，we would have got wet all over if we ________.(2013·重庆，29)
A.hadn’t B.haven’t
C.didn’t D.don’t
答案 A
解析 考查虚拟语气。根据第一句可知，下雨、带伞都是发生在过去的事情，故第二句“如果我们没带伞的话，全身都会淋湿的”这一情景是与过去事实相反的假设，故if条件句用过去完成时，主句用“would/should/might/could+have done”。
18.I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.(2012·新课标全国，30)
A.couldn’t B.mustn’t
C.shouldn’t D.needn’t
答案 D
解析 根据后面的because引导的原因状语从句的内容可知选D项，即“因为每天早晨六点钟那列火车都经过我家，所以没有必要用闹钟来叫醒我”。couldn’t不能;mustn’t禁止;shouldn’t不应该;needn’t不必，不需要。
19.Grace doesn’t want to move to New York because she thinks if she________there，she wouldn’t be able to see her parents very often. (2012·安徽，31)
A.lives B.would live
C.has lived D.were to live
答案 D
解析 句意为：格雷斯不想搬到纽约去，因为她认为，如果她住在那里，她就不能经常看见她的父母了。这是与将来情况相反的虚拟条件句。由主句知此处是对“未来”情况的虚拟。if引导的虚拟条件句中表示与将来的事实相反时可使用过去式、“should+v.”或“were to+v.”的形式，故选D项。
20.—Happy birthday!
—Thank you!It’s the best present I________for.(2012·江苏，35)
A.should have wished
B.must have wished
C.may have wished
D.could have wished
答案 D
解析 A项意为“本应该期望而实际上并非如此”;B项意为“一定期望”;C项意为“也许期望”;D项意为“能够期望”。句意为：——生日快乐!——谢谢你!这是我能期望的最好的礼物了。根据句意可知，应选D项。
