连词用法讲解.ppt

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1、关于连词用法讲解现在学习的是第1页，共42页（一）并列连词：一）并列连词：并列连词可用来连接词与词，词组与词组，分句与并列连词可用来连接词与词，词组与词组，分句与分句。常用的并列连词有：分句。常用的并列连词有：and（和），（和），as well as（既（既又），又），both and（不但（不但而且），而且），not only but also（不但（不但而且），而且），not but（不是（不是而是），而是），neither nor（既不（既不也不），也不），either or（不是（不是就是），就是），or（或（或者），者），but（但是），（但是），yet（然而），（然而），for（

2、因为），（因为），so（所以），（所以），while（而），（而），when（这时）等。如：（这时）等。如：Both my brother and my sister are teachers./His room is bright but mine is gloomy（暗沉沉的）（暗沉沉的）.He can not only repair radios but also fix them./It is a glorious（光荣的）（光荣的）yet difficult task.现在学习的是第2页，共42页（二）从属连词（二）从属连词从属连词是指在复合句中引导从句的连结词从属连词是指在复合句中

3、引导从句的连结词。常。常见的从属连词有：见的从属连词有：引导时间状语从句的引导时间状语从句的：after,before,when,as,while,since,until,till,as soon as 引导原因状语从句的引导原因状语从句的：because,since,as引导让步状语从句的引导让步状语从句的：although,though,no matter（无论）（无论）,even if(though)引导条件状语从句的引导条件状语从句的：if,unless,once,so(as)long as 现在学习的是第3页，共42页引导结果状语从句的引导结果状语从句的：so that,such t

4、hat 引导目的状语从句的引导目的状语从句的：so that,in order that 引导比较状语从句的引导比较状语从句的：as as,not so(as)as,than 引导方式状语从句的引导方式状语从句的：as if 引导主语，宾语或表语从句的连词主要有引导主语，宾语或表语从句的连词主要有：that,whether,if三个。其中三个。其中that 和和whether有时候还可有时候还可以引起同位从句和状语从句。以引起同位从句和状语从句。现在学习的是第4页，共42页（三）某些用法比较特殊的从属连词用法区别（三）某些用法比较特殊的从属连词用法区别1.当当while,when,as引导时间

5、状语从句时的区别：引导时间状语从句时的区别：while引导的状语从句中引导的状语从句中动词动词必须必须是持续性。谓语是持续性。谓语动词多为动词多为进行时进行时，或，或状态动词的一般时状态动词的一般时。while 的这些用法可用的这些用法可用when代替，等于代替，等于“at the time that”,“during the time that”。例如：。例如：Please keep quiet while(when)others are studying；when除可指一段时间外，还可用来指一点时间，除可指一段时间外，还可用来指一点时间，等于等于“at the time”，也就是说，也就是

6、说when引出的时间状引出的时间状语从句中的谓语动词可以是终止性的，也可以延语从句中的谓语动词可以是终止性的，也可以延续性的。续性的。因此主句和从句的谓语可以是一般时，进因此主句和从句的谓语可以是一般时，进行时，或完成时。例如：行时，或完成时。例如：现在学习的是第5页，共42页When I went into the lab,the teacher was doing an experiment.（when不能换成不能换成while、He often makes mistakes when he is speaking English.（when可换成可换成while）as常可与常可与when

7、，while通用，但强调通用，但强调“一边、一边、一边一边”。例如：。例如：As(when,while)I was walking down the street,I noticed a police car in front of Number 37.现在学习的是第6页，共42页 when引导的状语引导的状语从句中的主语与主句主语从句中的主语与主句主语一致一致，从句中是，从句中是“主语主语+be动词动词”结构时，这结构时，这时主语和时主语和be动词动词可以省略可以省略。例如：。例如：When(he was)young,he worked for a rich man.when有时代替有时代替

8、if，引导条件句，引导条件句，意为，意为“如如果果”、“假如假如”，例如：，例如：Ill come when(if)Im free.现在学习的是第7页，共42页2、before 的特殊用法的特殊用法before作连词一般表示时间，意为作连词一般表示时间，意为“在在之前之前”，但有些句子中这样译就显得别扭，但有些句子中这样译就显得别扭。试看。试看以下句子的翻译：以下句子的翻译：He almost knocked me down before he saw me.他他几乎把我撞倒才看见我；几乎把我撞倒才看见我；Before I could get in a word he had measured

9、 me.我还没来得及插话，他已经给我量好了尺寸。我还没来得及插话，他已经给我量好了尺寸。拓展：有关拓展：有关before特殊句型用法特殊句型用法现在学习的是第8页，共42页1）It will(not)be+时间段时间段+before+从句（现在时）从句（现在时）意思是意思是“要过一段时间才要过一段时间才/用不了多长时间就用不了多长时间就”It will not be long before we meet.要不了多久我要不了多久我们就会见面的。们就会见面的。It will be 5 days before you get your licence.你还有你还有5天时间就拿到证来了天时间就拿到证

10、来了2）It was(not)+时间段时间段+before+从句（过去时），意从句（过去时），意思是思是“过了一段时间才过了一段时间才/没过一段时间就没过一段时间就”It was not long before our hometown was liberated没没过多久我们的城镇就解放了。过多久我们的城镇就解放了。现在学习的是第9页，共42页3、till,until 用法区别用法区别用于否定句时用于否定句时，结构为，结构为not until(till)，主主句谓语动词延续与非延续都可以句谓语动词延续与非延续都可以，意为，意为“直到直到才才”。用于肯定句时，只与延续性用于肯定句时，只与延续性

11、动词连用，动词连用，表示表示“到到为止为止”。例如：例如：They played（延续性动词）（延续性动词）volleyball until(till)it got dark.He didnt go to bed（非延续性动词）（非延续性动词）until(till)the his father came back.；现在学习的是第10页，共42页until可以放在句首，可以放在句首，till则不行则不行，例如：例如：Until the last minute of the match we kept on playing.在在not until 引导的倒装句中，不用引导的倒装句中，不用till

12、,如：如：Not until he finished his work did he go home.（倒装）；（倒装）；till,until只用于时间只用于时间，以下句子是错误的：，以下句子是错误的：We walked until/till the edge of the forest.（要用要用as far as或或to表达表达）。）。现在学习的是第11页，共42页4、because,since,as引导原因状语时注意使用上引导原因状语时注意使用上的区别：的区别：如果如果原因是原因是构成句子的构成句子的最主要部分最主要部分,一般用一般用because,因此因此because引导的从句往往放

13、在句末引导的从句往往放在句末。用用why提问的句子，一定用提问的句子，一定用because回答回答。例如：。例如：He had to stay at home yesterday because he was ill.；如原因已为人们所知，或不如句子的其他部如原因已为人们所知，或不如句子的其他部分重要，就用分重要，就用as，或，或 since。since比比as更正式些。更正式些。as和和since引导的从句一般放在句子的开头。引导的从句一般放在句子的开头。一般情况下一般情况下as译成译成“由于由于”，since译成译成“既然既然”现在学习的是第12页，共42页例如：例如：As you are

14、 tired,you had better rest.Since everyone is here,now lets begin.5、although和和thoughalthough和和though引导让步状语从句往往用法一引导让步状语从句往往用法一样，但注意以下区别：样，但注意以下区别：although用于各种文体，而用于各种文体，而though则多用于非正则多用于非正式的口语或书面语中。注意式的口语或书面语中。注意由由although,though引导的从句后，主句不能用引导的从句后，主句不能用but，但可用副词但可用副词yet,still。例如：。例如：Although/Though i

15、t rained all the morning,they still went on working.（或（或yet they went on working）现在学习的是第13页，共42页 though常与常与even连用，构成连用，构成even though 短语，短语，even though表示强调，意为表示强调，意为“即使即使”，但不能说，但不能说even although，例如：，例如：Even though I didnt understand a word,I kept smiling.though可用作可用作副词副词，意为，意为“可是，然而可是，然而”，常，常用逗号与句子分开

16、。例如：用逗号与句子分开。例如：It was a quiet party,I had a good time,though.although则不能这样使用，它只作连词。则不能这样使用，它只作连词。现在学习的是第14页，共42页6、once用法用法once作副词译作副词译“曾经曾经”，作为连词译，作为连词译“一一旦旦”，引导条件状语从句。相当于，引导条件状语从句。相当于if的加强的加强形式。例如：形式。例如：I dont believe he was once a thief.(once这里是副词这里是副词)Once Aristotle had made up his mind that hea

17、vy objects always fell faster than light objects,he taught it as a truth to his students.(once连词连词)现在学习的是第15页，共42页7、unless引导条件状语从句等于引导条件状语从句等于if not。例如：。例如：Hell accept the job unless the salary is too low.=Hell accept the job if the salary is not too low.看下列这道题看下列这道题 He had never been praised before

18、 _he went to university.A unless B.until C.when D,ifB.Until从从句中时态：句中时态：主将从现主将从现现在学习的是第16页，共42页8、在用、在用as if引导的方式状语从句及表引导的方式状语从句及表语从句中，根据情况要使用虚拟语气。语从句中，根据情况要使用虚拟语气。例如：例如：He talks as if he knew all about it.但但有时也可用直陈语气。例如：有时也可用直陈语气。例如：It looks as if it is going to rain.现在学习的是第17页，共42页9、whether,if引导从句的用

19、法区别：引导从句的用法区别：引导主语从句、表语从句或同位语从句引导主语从句、表语从句或同位语从句时，用时，用whether，不用，不用if。例如：例如：Whether they will go to the Great Wall is not known.The question is whether we can finish the task on time.The question whether we will take part in the physics contest has not been decided.现在学习的是第18页，共42页 whether可接不定式，而可接不定

20、式，而if则不可则不可。例如：。例如：I havent decided whether to leave or not.whether可作介词的宾语或置于句首表示强调，可作介词的宾语或置于句首表示强调，而而if则不可。例如：则不可。例如：Everything depends on whether we have enough money.Whether he will come,I am not sure.whether和和if均可引导宾语从句，均可引导宾语从句，whether引导引导的宾语从句一般都是肯定句，的宾语从句一般都是肯定句，if引导的宾语从句可引导的宾语从句可以是肯定的，也可以是否

21、定的（此时不能用以是肯定的，也可以是否定的（此时不能用whether），例如：），例如：Could you tell us whether/if it rains in winter in Australia?I wonder if it doesnt rain.现在学习的是第19页，共42页 引导宾语从句的引导宾语从句的whether和和if常可与常可与or not连连用。连用时要注意用。连用时要注意or not的位置，有时候与的位置，有时候与 whether、if分开使用，有时它可与分开使用，有时它可与whether合合起来使用，但起来使用，但不能与不能与if合起来使用合起来使用。例如：。

22、例如：I dont know whether/if they will come or not.I dont know whether or not they will come.（这时候不能用（这时候不能用if）if可用来引导条件状语从句，译可用来引导条件状语从句，译“如果如果”，whether则不行。例如：则不行。例如：If you work hard,you are sure to succeed.现在学习的是第20页，共42页10、as作从属连词可引导多种状语从句。作从属连词可引导多种状语从句。as引导时间状语从句，意为引导时间状语从句，意为“当当时时”。例如：。例如：As(he wa

23、s)a young man,he was a storekeeper and later a postmaster./He sang as he worked.as引导方式状语从句，意为引导方式状语从句，意为“象象一样一样”。例如：。例如：We must do as the Party teaches us.as引导原因状语从句。意为引导原因状语从句。意为“由于由于”，例如：，例如：As you are tired,you had better rest.as引导让步状语从句。意为引导让步状语从句。意为“虽然虽然”、“尽管尽管”Child as he is,he can do it well.

24、(=Although he is a child,he can do it well.)另外，另外，as做为关系代词还可以引导定语从句，如：做为关系代词还可以引导定语从句，如：I have the same book as you.现在学习的是第21页，共42页 专项巩固专项巩固-连词连词 请同学们做试卷上的习题请同学们做试卷上的习题现在学习的是第22页，共42页练习、连词练习、连词1.He is very old,_ he still works very hard.A.but B.if C.when D.as2._ you are dismissed.A.Neither you go no

25、r B.Either you go orC.Whether you go or D.Both you go and3.They had camped露营露营 once before,_ they knew what to take.A.because B.now C.so D.since现在学习的是第23页，共42页4.Why these things happened was _ the driver had been careless.A.because of B.owing toC.due to D.that5.Although,its raining,_are still workin

26、g in the fields.A.they B.but they C.and theyD.so they6._we have satisfied you,you have no grounds理由理由 of complaint.A.So B.Since that C.Now that D.By now.现在学习的是第24页，共42页7.Write clearly _ your teacher can understand you correctly.A.since B.for C.because D.so that8.Youll miss the train _ you hurry up.A

27、.unless B.as C.if D.until9.Francis did the task_ his brother.A.as good as B.as better as C.as well as D.as best as10.The size of the audience,_ we had expected,was well over twenty thousand.A.as B.what C.that D.whom现在学习的是第25页，共42页11.I thought he hated the TV.You are right,_ he still watches the prog

28、ram.A.yet B.besides C.also D.then12.It looks _ its going to rain.A.that B.as C.as if D.like that13._ to New York,her father has not heard from her.A.Because she went B.After she wentC.When she went D.Since she went14._he daydreamed,Peter saw figures in the sky.A.Until B.Since C.While D.During现在学习的是第

29、26页，共42页15.We arrived at the station _ the train had left.A.after B.before C.since D.when16._ he was in poor health,he worked just as hard as everyone else.A.But B.Although C.Even if D.If17.Give me one more minute _ Ill have finished.A.so B.until C.and D.when18.The worker hunted for jobs in New York

30、 for months,_ he could not find any work.A.and B.yet C.or D.and but现在学习的是第27页，共42页19.Hurry up,_ youll be late.A.or B.and C.so D.yet20.Do not make the same mistake _ I did.A.so B.as C.like D.that21.My sister is waiting for me,_ I must be off now.A.however B.or C.so D.otherwise22.We should pay attenti

31、on _ to industry _ to agriculture.A.either,or B.neither,nor C.not,but D.both,and现在学习的是第28页，共42页23.He ran off_ I could stop him.A.before B.after C.since D.when24._ you told me,I had heard nothing of what happened.A.Till B.Until C.After D.Since25.Where have you been _ you left home?A.before B.as C.sin

32、ce D.when 26._ the problem of method is solved,talking about the task is useless.A.Until B.SinceC.AfterD.Unless现在学习的是第29页，共42页27.We have produced 15%more cotton this year_ we did last year.A.as B.than C.like D.white28.It is late;_,Im too tired to go out.A.besides B.except C.except for D.except that2

33、9.Everything around us is _ solid.liquid _ gas.A.not.but.B.either.or.C.neither.nor.D.whether.or.30.He will come _ you ask him.A.whether B.unless C.if D.while现在学习的是第30页，共42页31._ he will come or not is still unknown.A.If B.Where C.That D.Whether32.I don t know _ to stay at home or go out.A.whether B.i

34、f C.how D.where33.He spoke loudly _ the audience could hear him clearly.A.so B.that C.so that D.in order to现在学习的是第31页，共42页34.The book is not easy._ its rather difficult.A.On the one hand B.On the contrary C.On the other hand D.On the other contrary35.You must work hard,_ you will not learn English w

35、ell.A.if B.whether C.otherwise D.unless36.It rained heavily,_ the basketball match had to be put off.A.so that B.when C.otherwise D.therefore现在学习的是第32页，共42页37.We must do _ the people want us to do.A.whatever B.however C.wherever D.whenever38.You are certainly right,_ others may say.A.what B.whatever

36、 C.that D.as39._ makes mistakes must correct them.A.Who B.What C.Whoever D.Whatever40.Ill discuss it with you _ you like to come.A.when B.where C.whoever D.whenever现在学习的是第33页，共42页41._ you work,you must always serve the people heart and soul.A.Wherever B.Whenever C.Where D.When42._you understand this

37、 rule,you will have no further difficulty.A.Once B.At once C.Only D.Only then43._ difficult the task may be,we must fulfil it this month.A.No matter how B.No matter what C.No matter when D.No matter where现在学习的是第34页，共42页44.We can surely overcome these difficulties _,_ we are closely united.A.so far a

38、s B.so long as C.as soon as D.as well as45._ I know he will stay here for half a year.A.as soon as B.as long as C.so far as D.as well as46.Please write me _ you arrive in New York.A.as well as B.so long as C.as far as D.as soon as现在学习的是第35页，共42页47.That is not _ I want.A.that B.why C.what D.whose48._

39、 he did it remains a secret.A.What B.Whom C.Which D.How49.It is quite clear _ he wont see us.A.what B.that C.why D.how50.Would you tell me _ way I should take?A.what B.that C.which D.whose51.I am sure _ you said is true.A.what B.that C.which D.who现在学习的是第36页，共42页52.The trouble is _ we can not find su

40、ch an expert.A.why B.that C.where D./53.It has not been decided _ they will leave.A.why B.when C.which D.what54.We shall go _ you are ready.A.while B.as soon as C.as D.since55.He will tell you about it _ you get there.A.while B.as C.when D./现在学习的是第37页，共42页56.Dont try to get off the bus _ it has stop

41、ped.A.while B.as C.since D.before57.Ill come and see you _ I go to the countryside.A.while B.when C.as soon as D.before58._ he came to study in the university,he has made much progress in the study of English.A.While B.When C.Since D.After现在学习的是第38页，共42页59.Things have changed a lot _ I wrote to you

42、last time.A.when B.since C.as D.before60.I cant use your pen,_ there is no ink in it.A.for B.when C.if D.whether 61.Id like to go swimming _ the water is not too cold.A.for B.unless C.if D.whether62.Difficulties are nothing _ we are not afraid of them.A.for B.as C.if D.whether现在学习的是第39页，共42页63.The d

43、octor will not perform the operation _ it is absolutely necessary.A.when B.if C.for D.unless64.Go back _ you came from.A.until B.where C.which D.when65.He lay _ the grass was the thickest.A.where B.when C.that D.after66.You will find friendly people _ you go in China.A.where B.and C.wherever D.so67.

44、_ it was already dark,they went on working in the fields.A.If B.Whether C.But D.Though现在学习的是第40页，共42页68._ he has finished writing the novel is unknown.A.If B.Whether C.When D.While69.Well go and see the patient _we are busy.A.even if B.for C.if D.while70.The museum is _ far _ it will take us half an hour to get there by bus.A.such.that B.as.as C.so.that D.so as现在学习的是第41页，共42页感感谢谢大大家家观观看看现在学习的是第42页，共42页