例如：He put his coat over the child lest he should catch cold.
例如：They talked as if they had been friends for years.
例如：It is high time you handed in your test paper.
例1：I wish I were as strong as you.
例2：He insisted that we (should) take up the matter at the meeting.
例1：Could you spare me a few minutes?
例2：You might have told me earlier.
例3：Hadn’t you better go and see you dentist about that tooth?
例1：Long live world peace.
例2：May you succeed.
1、If my brother ____ here last Sunday，he ____ me from going. A. had been；would have prevented B. had been；would prevent C. were；would prevent D. were；would have prevented 2、The judge ordered that the thief ____ punished. A. would be B. should be C. were to be D. must be 3、If the United States had not entered the Second World War，probably the 1940 unemployment rate of 14% ____ still further. A. would rise B. would risen C. would have risen D. had risen 4、He talked as if ____ for many years. A. is living there B. was living there C. has lived there D.had lived there 5、I wish I ____ you yesterday. A. saw B. did see C. had seen D. were to see 6、The rice ____ if you had been more careful. A. wouldn't be burning B. would not burn C. would not have been burned D. wouldn't be burnt 7、Without electricity，human being life ____ quite different today. A. would B. will be C. would have been D. would be 8、I'd rather you ____ anything about it for the time being. A. don't do B. didn't do C. hadn't done D. won't do 9、If he ____ in a day or two，I would wait for him. A. returns B. should have returned C. were to return D. have returned 10、I would go to the concert but I ____ no time. A. had B. had had C. have D. have had 11、How nice it ____ if I ____ a sister like you！ A. should be；had been B. would be；had been C. would be；had D. were；had 12、____ in your position，I would go. A. If I B. Were I C. If was I D. If I am 13、____ five minutes earlier，you could have seen them off. A. If you should arrive B. If you arrived C.Had you arrived D. Should you arrive 14、I am glad we had a map. I am sure we ____ if we ____ one. A. would have got lost；hadn't had B. would get lost；hadn't C. couldn't have get lost；had had D. may get lost；don't have 15、The doctor insisted that this patient ____ seriously ill and he ____ on. A. should be；should be operated B. should have been；had been operated C. had been；should operate D. was；should be opearated 16、I wish my husband ____ as well as ____. A. will dress；you B. be dressd；you C. dressed；you D. dress；you 17.If we ____ hard in the past few years，things ____ so smoothly now. A. had't worked；had gone B. hadn't been working；wouldn't be going C. didn't work；weren't going D. hadn't worked；would have gone 18、I ____ each of the group leaders immediately work out a practical plan of study. A. hope B. except C. wish D. suggest 19、Without the air to hold some of the sun‘s heat. the earth at night ____，too cold for us to live. A. would be freezing cold B. can freeze coldly C. will be freezing coldly D. would be frozen cold 20、---____ you booked the tickets in advance，we would have left for Italy. ---If so，we ____ the ball and failed to see a lot of interesting people there. A. had；should miss B. should；might have missed C. should；had missed D. had；would have missed