高中英语选修六-Unit--B.ppt

Learning about languageEx.1Possible meaningswordwhich1 n.a general tendency in the way a situation is changing2 v.to start doing something that everyone copies1 v.to make something(especially sth.bad)increase2 n.a substance that can be burned to make heart or energy1 n.the physical or mental condition of someone2 v.to formally say or write some information or an opinion1 v.to use time,energy,goods,etc.2 v.(formal)to eat or drink something1 v.to look quickly at someone or something2 v.to read something very quicklytrendfuelstateconsumeglance122121Ex.21.data,kept on2.quantities,run out3.build up,e about5.consequence6.phenomenon7.graph8.per9.even if10.resulted inLearning about languageEx.11.It is scientists who warned that greenhouse gases would warm the earth by trapping heat energy in the atmosphere.2.it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.Ex.21.It is scientists who warned the greenhouse gases would warm the earth by trapping heat energy in the atmosphere.2.It is the greenhouse effect that gives the earths surface the average temperature of 15.3.It is fossil fuels that much of the energy used to light and heat our homes comes from.24.It is the developed countries that consume the most energy in the world.5.It is for centuries that carbon dioxide has the tendency to stay in the atmosphere only for a day or less.6.It is their very existence that low-lying countries feel is in danger from rising sea levels.7.It is environmentalists who have tried to stop the earths temperature rising.8.It is future climate changes and their effects on our environment that scientists want to find out about.9.It is by several meters that the level of the sea could rise in the years ahead because of global warming.10.It is outer space that might provide us with new energy sources in the future.The use of it(2)Unit 4 Grammar3在上一单元我们已经讲解了在上一单元我们已经讲解了it在句在句中可以用作许多成分中可以用作许多成分,在本单元我在本单元我们用图表的形式进行整理使同学们们用图表的形式进行整理使同学们对对it的用法的用法有系统的掌握有系统的掌握。4性性质质功功 能能例例 句句代代词词用作人称用作人称代词，代代词，代替上文提替上文提到的人或到的人或事物。事物。Who is it?Its me.Youve helped me a lot;Ill never forget it.5性质性质功功 能能例例 句句代代词词用以代替用以代替指示代词指示代词this或或that。Whats this?Its a computer.Whose book is that?Its hers.6性质性质功功 能能例例 句句代代词词表示时表示时间、天间、天气、距气、距离、价离、价钱等。钱等。Its time for lunch.Its raining hard.Its two miles from the school to our home.7引引导导词词作形式主语作形式主语,代替由不定代替由不定式、动名词式、动名词或从句等表或从句等表示的真正主示的真正主语。语。It is easy to buy a new radio.It is no use telling him that.It doesnt matter whether she comes or not.8引引导导词词作形式宾语作形式宾语,代替由不定代替由不定式、动名词式、动名词或从句等表或从句等表示的真正宾示的真正宾语。语。I feel it my duty to help him.We thought it no use doing that.Ive made it clear that nobody is allowed to smoke here.9引引导导词词表示强调表示强调,其结构是其结构是:It is/was+强强调部分调部分+that+原句剩余部分。此结原句剩余部分。此结构只限于强调状语、主语和宾语。构只限于强调状语、主语和宾语。注意：注意：如果强调的是人如果强调的是人,其后用其后用that或或who 均可均可;如果强调的是物、如果强调的是物、时间或地点等状语时间或地点等状语,其后只能用其后只能用that不用不用where、when、why。10引引导导词词I saw Tom here yesterday.It was I that/who saw Tom here yesterday.It was Tom that/who I saw here yesterday.It was yesterday that I saw Tom here.It was here that I saw Tom yesterday.11引引导导词词注意注意:若原句是若原句是notuntil句型句型,在强在强调调until 部分时部分时,要把否定形式放入被要把否定形式放入被强调部分。例如强调部分。例如:He didnt leave until l returned.=It wasnt until I returned that he left12强强调调句句型型若强调谓语若强调谓语,则则用用do/does/did+动词原形动词原形,常译常译为为“的确的确”“一定一定”等等,该结该结构只能用于陈述构只能用于陈述句或祈使句中。句或祈使句中。引导的强调句与引导的强调句与其它从句的区别其它从句的区别在于：在于：Do be patient!一定要有耐心。一定要有耐心。He does want to learn English well.他的确想学好英语。他的确想学好英语。It was in the place that I was born.(强调句强调句)It was the place where I was born.(定语从句定语从句)13易易混混的的其其它它从从句句 强调句型中前强调句型中前后时态应一致后时态应一致;被强调的部分为被强调的部分为主语、宾语和状主语、宾语和状语语,若把若把it iswas和和thatwho去掉去掉,剩下的词语能重剩下的词语能重新组成正确的句新组成正确的句子子,而且不缺成分而且不缺成分,否则就是其它从否则就是其它从句。句。It was in 1945 that World War II ended.(强强调句调句)It was 1945 when World War II ended.(状语从句状语从句)It is a long time since I met you last.(时间状时间状语语)It is time that you went to bed.(定语从句定语从句)14我们用图表的形式对我们用图表的形式对it的用的用法进行的归纳法进行的归纳,相信同学们相信同学们已经对已经对it的用法有了更清晰的用法有了更清晰的认识。的认识。接下来我们对接下来我们对it在强调句中在强调句中的用法做一小结。的用法做一小结。15用在强调句型中用在强调句型中,为了强调句子的为了强调句子的某一成分某一成分(通常是主语、宾语或状语通常是主语、宾语或状语),常用结构常用结构:It is/was 被强调部分被强调部分that(who)I met Tom in the street yesterday 16 It was I who(that)met Tom in the street yesterday.It was Tom that I met in the street yesterday.It was in the street that I met Tom yesterday.It was yesterday that I met Tom in the street.主语主语宾语宾语时间状语时间状语地点状语地点状语17 1.Peter lent us the money.2.They want money.3.All this happened on Monday.It was Peter who lent us the money.It is money that they want.It was on Monday that all this happened.根据划线部分把下列句子变成强调句。根据划线部分把下列句子变成强调句。184.I didnt hear from her until last summer.5.Why does everyone think I am narrow-minded?It was not until last summer that I heard from her.Why is it that everyone thinks I am narrow-minded?19口诀：口诀：代词代词 it 本意它本意它,既可指这又指那既可指这又指那;时间天气均可指时间天气均可指,谈到距离也用它谈到距离也用它;假主假宾均可作假主假宾均可作,强调句型跟强调句型跟that。it在句子中可以作如此多的成分在句子中可以作如此多的成分,那么那么我们如何区分我们如何区分it在句中的不同成分呢在句中的不同成分呢?201.It is two years _ I joined the army.A.before B.since C.that D.after2.It was two years _ I joined the army.A.before B.since C.that D.afterPractice213.It was not until 1920 _ regular radio broadcast began.A.while B.which C.that D.since4._ is a fact that English is being accepted as an international language.A.There B.This C.That D.It225.It was about 600 years ago _ the first clock with a face and an hour hand was made.A.that B.until C.before D.when6.I hate _ when people talk with their mouths full.A.it B.that C.these D.them 237.The Parkers bought a new house but _ will need a lot of work before they can move in.A.they B.it C.one D.which8._ no need for us to discuss the problem again since it has already been settled.A.It has B.There has C.It is D.There is249._ was in 1979 _ I graduated from the university.A.That;that B.It;that C.That;when D.It;when10.What a pity my new computer doesnt work!_ must be something wrong with it.A.It B.There C.This D.That2511.I like _ in the autumn when the weather is clear and bright.A.this B.that C.it D.one12.Someone is knocking at the door,but who can _ be?A.one B.he C.she D.it2613.A knock on the door made him look up.But _ was only the manager.A.this B.that C.she D.it14.Someone is ringing the doorbell.Go and see _.A.who is he B.who he is C.who is it D.who it is 2715.Is _ necessary to complete the design before National Day?A.this B.that C.it D.he16.Does _ matter if he cant finish the job on time?A.this B.that C.he D.it2817._ worried her a bit that her hair was turning grey.A.That B.It C.What D.This18.They have made _ a rule _in the room.A.this;not to smoke B.it;smoking C.it;to not smoke D.it;not to smoke291.It was because of bad weather_ the football match had to be put off.2.(2003 上海上海春春)A.so B.so that C.why D.that 高考链接高考链接302.It was with great joy _ he received the news that his lost daughter had been found.（2004 福建）福建）A.because B.which C.since D.that313.It was after the invention of printing _ to publish large numbers of books and pictures.（2005上海春）上海春）A.were people able B.that people were able C.when were people able D.people were able 324.It was after he got what he had desired _ he realized it was not so important.（2006 辽宁）辽宁）A.that B.when C.since D.as 335.It is imagination _ makes the world colorful,full of vigor and vitality.(2007 上海春上海春)A.where B.what C.that D.when346.It is not who is right but what is right _ is of importance.(2007 重庆卷重庆卷)A.which B.it C.that D.this351.Its difficult to remember all their names.2.Its very quiet in the caf.3.It rained for three days.4.He made it clear that he didnt want to speak to me.5.It was nice to meet you.形式主语形式主语,代替代替CircumstanceWeather形式主语形式主语,代替代替Discuss the following sentences and tell the function of“it”.形式宾语形式宾语,代替代替366.It was on Tuesday that Smith came.7.Its three miles from here to the nearest garage.8.A tall man stood up and shook hands.It was captain Jim.9.I hear you bought a new bike.Can you show it to me?用于强调句型中用于强调句型中Distance人称代词，代表前面提到的人人称代词，代表前面提到的人人称代词，代表前面提到的物人称代词，代表前面提到的物3710.It was five oclock when we got back home yesterday.11.It was dirty and wet below the ship where the slaves were kept.12.It was on this coast that lots of his people disappeared.13.It was most likely that one third of them had lost their lives.Time Circumstance用于强调句型用于强调句型作引导词，在句中作形式主语，作引导词，在句中作形式主语，代替后面的从句代替后面的从句38此课件下载可自行编辑修改，供参考！感谢您的支持，我们努力做得更好！39