as和therebe结构用法.doc

Book 5 Unit 5 First aid第二课时 （3）三、重点句型1. Do not rub, as this may break any blisters and the wound may get infected.不要擦拭，因为这样做会擦破水泡，伤口会感染。反思总结小结as的用法：（一）as作副词，表示程度，意为“同样地”。在“as. . . as. . . ”，“not as. . . as. . . ”结构中的第一个as是副词，作“和与(不)一样”解。e.g.：Jack is as tall as his father. He doesnt speak English asso fluently as you. （二）as作介词 作“如，像”解。e.g.：They got united as one man. 作“充当，作为”解。e.g.：As a writer，he was famous. （三）as作连词，常用来连接主句和状语从句1. 引导时间状语从句，作“当的时候”解，有“随着”之意，与while意义相近，强调两个动作同时发生；或某事一发生，另一事立即发生。e.g.：He shouted aloud as her ran along. 他一边往前跑，一边高声地呼喊。I was startled as he opened the door. 他一开门，吓了我一跳。 as作连词，相当于when。e.g.：As a little boy (When he was a little boy)he began to learn to play piano. 他小时候就开始学弹钢琴。 2. 引导原因状语从句，作“因为，由于”解，与because的用法相近。e.g.：I must stop writing now，as I have rather a lot of work to do. 我必须停笔了，因为我还有许多工作要做。引导方式状语从句或比较状语从句，作“正如，(如)像”解。e.g.：As in your country，we grow wheat in the north and rice in the south. 正如(像)你们国家一样，我们在北方种小麦，在南方种水稻。(方式状语从句) When at Rome，do as Romans do. 入乡随俗。(方式状语从句) 3. 引导让步状语从句，作“虽然，尽管”解。这时从句常用倒装语序，即把从句中的表语、状语或动词原形放在as之前。e.g.：Strange as it may seem，it is true. 尽管这事看上去很奇怪，但却是真的。 Try as he might，Tom could not get out of the difficulties. 不管怎样努力，汤姆还是摆脱不了困境。（四）as作关系代词1. 引导限制性定语从句，用在“suchas”, “the sameas”，“asas”等结构中，常译作“像一样的人(或物)”，“凡是的人(或物)”。 e.g.： He wished to be such a man as Lei Feng was. 他曾希望做一个像雷锋那样的人。My hometown is no longer the same as it was. 我的家乡再也不像过去一样了。2. 引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一点”。这个分句可以位于句首、句中或句末。e.g.：As is well known，oceans cover more than 70 of the earth. 我们知道，海洋占地球面积的百分之七十以上。（五）含as的固定词组的用法1. as soon as作“一就”解，引导时间状语从句。e.g.：As soon as I get to Beijing，Ill write to you. 我一到北京，就给你写信。2. asso long as作“只要”解，e.g.：AsSo long as you study hard，youll make progress. 只要你努力，你就会取得进步。3. as ifthough常用来引导方式状语从句，作“好像，仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。e.g.：She loves the child as ifthough he were her own. 她爱这个孩子如同爱自己的孩子。As ifthough也可用来引导表语从句，常用在“It appearslooksseems+as ifthough”句型结构中。e.g.：It appears as ifthough it is going to clear up. 看起来天要晴了。 It seems as ifthough he knew nothing about it.他好像对此事一无所知。4. as to作“关于，至于”解。e.g.：There is no doubt as to his honesty. 他的诚实是无可置疑的。 5. as muchmany as作“多达”，“达到之多”解。e.g.：He can earn as much as 5000 dollars a month. 他每月能挣5000美元。6. soas far as I know作“就我所知”解，在句中作插入语。e.g.：AsSo far as I know，he will come here next Monday. 据我所知，他将于下星期一到这里来。7. as a result，as a result of表示“由于的结果”。 e.g.： She died as a direct result of the accident. 她的死是那次事故的直接结果。8. as well为“也，还”之意。e.g.：Come early，and bring your brother as well. 早点来，把你的弟弟也带来。9. so as to，so. . . as to若跟动词原形，表示目的或结果。e.g.：He studied hard so as to pass the exam. 他努力学习以便通过考试。(表示目的)2. There is no doubt that Johns quick thinking and the first aid skills he learned at school saved Ms Slades life.毫无疑问，是约翰敏捷的思维和在学校学到的急救技术，使得Ms Slade的生命得救了。句子中的there is no doubt that 可以看作一个固定句型，意思为“毫无疑问”。在近几年的高考中，含有名词的固定句型成为一个重要考点。常见的句型有：There is no doubt that毫无疑问There is no denying that 毫无疑问There is a chance that 有可能There is a possibility that 有可能There is an opportunity that有一个机会It is no wonder that 难怪There is no need for sb. to do sth.某人没必要做某事 There is no use/good doing sth. 干某事没有用处It is no use /good doing sth. 干某事没有用处There is no point （in）doing sht. 干某事没有意义There is no sense doing sth. 干某事没有意义It is an coincidence that某事是巧合。反思总结高考考查点常放在（1）是there be句型，还是it be句型（2）从句的引导词that（3）句型中非谓语动词的使用。解题时要对这些句型敏感，并且要牢固记忆总结，灵活运用。当堂达标1.he hasnt slept at all for three days._ he is tired out. （2005湖北）A. There is no point B. There is no need C. It is no wonder D. It is no way2.Brad was Janes brother!-_he reminded me so much of Jane!（2004浙江）A. No doubt B. Above all C. No wonder D. Of course3.It cant be an _that four jewelery stores were robbed in one night.（2002上海春） A. coincidence B. accident C. incident D. chance4.There is much chance _Bill will recover from his injury in time for the race. （2006天津）A. that B. which C. until D. if5.Some researchers believe that there is no doubt _a cure for AIDS will be found.（2005广东）A. which B. that C. what D. whether6.It is no _arguing with Bill because he will never change his mind. （2006全国）A. use B. help C. time D. way 7.It is _any wonder that his friend doesnt like watching television much.（2004广东）A. so B. such C. nearly D. hardly 1.本题考查这些句型的使用语境的不同进行辨析。There is no point 后常接doing ,意思为干某事没有意义；there is no need后常接to do，意思为干某事没有必要； it is no wonder 后常接that 从句，意思为难怪某事；it is no way意思为某事没门，决不可能。因此只有C项合乎句子的意思。答案：C2.句子的意思为“Brad是约翰的哥哥。难怪他经常使我想起约翰来。”本题考查句型在口语中省略结构的使用语境辨析。根据句子的意思只有C 项合适。答案：C3.本题考查这些句型中名词语意的辨析，句子的意思为四个珠宝店在一夜间被盗决不是巧合。故只有A项合乎句子 的意思。答案：A4.本题正好考查名词chance的一个句型，there is much cha