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1、Unit 4 Helping people around the world Grammar and usage,Unreal conditions,Revision,would / could / might / should +动词原形(do),1. 如果现在不下雨的话, 我们就出去野餐了。 If it_ not raining, we _ for a picnic. 2. 如果他来这，他就能够帮助你了。 If he _ here, he _ able to help you.,were,should go,came,might be,were,would take,Unreal cond
2、itions,would / could / might / should + have done,1. 要是当初她被邀请的话, 她就会参加这次聚会了。 She _ to the party if she _. 2. 今天早上，她要是不叫我的话，我就会睡过头了。 If she _ me, I _ _ this morning.,would have gone,had been invited,hadnt called,overslept,would have,3. 如果你上个学期用功些, 你就会在考试中过关了。 If you _ harder last term, you _ exam.,ha
3、d studied,could have passed,Unreal conditions,would / could / might / should +动词原形(do),如果你成功，一切就好了。 If you _, everything would be all right. If you _, everything would be all right. If you _, everything would be all right.,succeeded,should succeed,were to succeed,2. 明年我要是二十岁，我就会学计算机课程。 If I _ twenty
4、 years old next year, I _ the course of computer science.,were to be,would take,1. 如果你昨天问他, 你现在就知道怎么办。 If you _ him yesterday, you _ what to do now. 2. 如果昨晚下雨，今天会很冷。 If it _ last night, it _ very cold today.,had asked,would know,had rained,would be,Complete the following sentences.,3. 如果我是你, 我就不会错过昨
5、天晚上的那部电影。 If I _ you, I _ the film last night,were,wouldnt have missed,Note: When the main clause is about the present and the if clause refers back to the past, or vice versa, we use mixed conditionals.,If you were older, I _ you to go there yesterday. A. will allow B. should allow C. would have al
6、lowed D. had allowed,If he _ to the teacher attentively, he _ the answer to the problem now. A. had listened, would have known B. listened, would know C. listened, would have known D. had listened, would know,1. 我很忙，否则我可帮助你。 I am busy now, otherwise I _ you the favor. 2. 要不是你的劝告, 我是不会做这份工作的。 But for
7、 your advice, I _ able to do this work,would do,would not be,Complete the following sentences.,Note: In implied conditionals, we use otherwise, or, and phrases beginning with with, without and but for in place of if-clauses.,3. 要不是你，我不会认识他。 Without you, I _ him.,would never know,He was very busy yes
8、terday, otherwise he _ to the meeting. A. would come B. came C. would have come D. had come Without electricity human life _ quite different today. A. is B. will be C. would have been D. would be,I would have come earlier, but I _ that you were waiting for me. A. didnt know B. hadnt know C. would ha
9、ve known D. havent known,Note: We can put should, were, and had at the beginning of an unreal conditional sentence. In this case , if is not needed any more.,1. If they were here now, they could help us. Were they here now, they could help us. 2. If you had come earlier, you would have met him. Had
10、you come earlier, you would have met him.,Complete the following by omitting if.,3. If it should rain, the crops would be saved. Should it rain, the crops would be saved.,1. My cat wouldnt have bitten the toy fish _ it was made of rubber. A) if she has known B) if she knew C) she should have know D)
11、 had she known,D,2. _ for my illness I would have lent him a helping hand. A) Not being B) Had it not been C) Without being D) Not having been,B,3. _ before we depart the day after tomorrow, we should have a wonderful dinner party. A) Had they arrived B) Would they arrive C) Were they arriving D) We
12、re they to arrive,D,4. _ right now, she would get there on Sunday. A) Would she leave B) If she leave C) Were she to leave C) If she had left,C,5. Had he worked harder, he _ the exams. A) must have got through B) would have got through C) would get though D) could get through,B,6. _ to do the work,
13、I should do it some other day. A. If were I B. I were C. Were I D. Was I,C,在suggest (建议), recommend (推荐), advise (劝告), propose (建议), insist (坚持), consent (允诺), decide (决定), order (命令), request (要求), demand (要求), desire (期望), ask (要求)后的宾语从句中谓语动词用should +动词原形。should 可省略。,Subjunctive Mood in Noun Claus
14、e,1. I suggested that it _ quicker to travel by train. (be) 2. He insisted that we _ him the news. (tell),(should) be,(should) tell,Subjunctive Mood in Noun Clause,3. He ordered that the students _ the clothes every week by themselves. (wash) 4. She recommended that we _ giving offense. (avoid),(should) wash,(should) avoid,5. He insisted that all of us _ there on time by any means. (be) 6. The teacher suggested that we _ the blackboard after class. (clean),
