目 录 上一节 下一节 
如果没有你们的帮助,我们绝不可能克服这些困难.) 2.Had he worked harder, he would have got through the exams.( 如果他再用些功,他就会通过考试.) 3.The millions of calculations involved, had they been done by hand, would have lost all practical value by the time they were finished.( 所涉及的数百万次计算,若用手工进行,等到完成时恐怕早就失去一切实用价值了.) 4.Had she been given some information, she could have answered the questions.( 如果给她一些信息,她就能回答这些问题.) 5.If the doctor had been available, the child could not have died.( 如果有医生的话，孩子就不会死了.) 
如果我知道你的电话号码，我就会给你打电话。) 1.If I were you, I would give him a lesson.( 如果我是你,我会好好教训他.) 2.If he were here, the problem could be solved.( 如果他这儿,问题就能解决了.) 3.If there were no examinations, we would have a much happier time at school.( 如果没有考试的话，我们在学校将会有更多的欢乐时光.) 4.If you were to see our teacher, what would you tell her?( 如果你见到我们的老师,你会告诉她什么?) 
（如果他来得早，告诉他等候他的妻子。） 6.Were he to leave tomorrow, he would get there by Friday.( 如果明天他离开的话，星期五他会在哪里.) 7.The task was very dangerous. But should we succeed, we would be very famous.( 尽管这项任务很危险,但是如果我们成功的话,我们就会出名了.) 8.Were they to arrive before we depart the day after tomorrow, we should have a wonderful dinner party.( 如果他们能在后天我们离开前到达,我们会举行盛大的晚会.) 9.I won't be able to go there tomorrow. If I should go there tomorrow, I would see you.( 我明天不能去那儿,如果能去，我将能见到你.) 
我原本是可以和我的朋友去美国的，但被我老妈阻止了.) 2.If we had been more careful, we would be getting much better results now.( 如果我们再细心点，现在我们将得到更好的结果.) 3.If you hadn't contacted Jerry Brown until recently, you'd think the photograph on the right was strange.( 如果你不是最近接触了Jerry Brown,你会对右方的照片感到奇怪的.) 4.Had Paul received six more votes in the last election, he would he our chairman now.( 如果Paul能在赏赐选举中多得六票的话，他现在就是我们的主席了。) 5.Had the United States built more homes for the poor people in 1955, the housing problem now in some parts of the country wouldn't be so serious.( 如果美国政府在1955年能为穷人多建一些房子的话,现在一些地方的房子也不会这么紧张了.) 
如果昨天你不看电视，你现在也不会这么困了.) 7.If we hadn't gotten everything ready now, we would be having a terrible time tomorrow.( 如果我们至今还没把一切准备就绪,明天就会遇到难堪的局面.) 1.Luckily he was sent to the hospital immediately.( 幸运的是，他马上就被送到了医院.) 2.Without the air to hold some of the sun's heat, the earth at night would freeze.( 如果不是空气保存了一些太阳的热量,在夜间地球就会冻冰.) 3.We didn't know his telephone number; otherwise we would have telephoned him.( 我不知道他的电话号码，不然的话，我就会打给他.) 
如果你再早来5分钟，我们就能赶上那辆车了.) 5.he must have had an accident, or he would have been here then. 他一定出事了，不然的话，他一定到这里了.) 6.I told him how to get here but perhaps I should have given him a map.( 尽管我已告诉他怎样到这里,但也许还应该给他张地图.) 10.He might have been killed but for the arrival of the police.( 若不是警察及时赶到,他会被杀死的.) 11.Tom should have known better than to ask Dick for help.( 汤姆应该知道让迪克帮忙非明智之举.) 
安全分析本来会识别该事物的潜在危险,不幸的是没有进行安全分析.) 13.But for the English examination I would have gone to the concert last Sunday.( 若不是有英语考试,上星期日我就会听音乐会.)
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