连词用法讲解.pptx

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1、（一）并列连词：并列连词可用来连接词与词，词组与词组，分句与分句。常用的并列连词有：and（和），as well as（既又），both and（不但而且），not only but also（不但而且），not but（不是而是），neither nor（既不也不），either or（不是就是），or（或者），but（但是），yet（然而），for（因为），so（所以），while（而），when（这时）等。如：Both my brother and my sister are teachers./His room is bright but mine is gloomy（暗沉沉的）.He

2、 can not only repair radios but also fix them./It is a glorious（光荣的）yet difficult task.第1页/共42页（二）从属连词从属连词是指在复合句中引导从句的连结词。常见的从属连词有：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：because,since,as引导让步状语从句的：although,though,no matter（无论）,even if(though)引导条件状语从句的：if,unless,onc

3、e,so(as)long as 第2页/共42页引导结果状语从句的：so that,such that 引导目的状语从句的：so that,in order that 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：as if 引导主语，宾语或表语从句的连词主要有：that,whether,if三个。其中that 和whether有时候还可以引起同位从句和状语从句。第3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1.1.当当while,when,aswhile,when,as引导时间状语从句时的区别：引导时

4、间状语从句时的区别：whilewhile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。谓语动词多为是持续性。谓语动词多为进行时进行时，或，或状态动词的一状态动词的一般时般时。while while 的这些用法可用的这些用法可用whenwhen代替，等于代替，等于“at the time that”,“during the at the time that”,“during the time that”time that”。例如：。例如：Please keep quiet while(when)others are studyingPlease keep quiet while(wh

5、en)others are studying；whenwhen除可指一段时间外，还可用来指一点时间，等于除可指一段时间外，还可用来指一点时间，等于“at the time”at the time”，也就是说，也就是说whenwhen引出的时间状语从句中的谓语动词可以是终止性的，也可以延续性的。引出的时间状语从句中的谓语动词可以是终止性的，也可以延续性的。因此主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：句和从句的谓语可以是一般时，进行时，或完成时。例如：第4页/共42页WWh he en n I I w we en nt t i in nt to o t th he e l la

6、 ab b,t th he e t te ea ac ch he er r w wa as s d do oi in ng g a an n e ex xp pe er ri imme en nt t.（w wh he en n不不能能换换成成w wh hi il le e、HHe e o of ft te en n mma ak ke es s mmi is st ta ak ke es s w wh he en n h he e i is s s sp pe ea ak ki in ng g E En ng gl li is sh h.（w wh he en n可可换换成成w wh hi

7、il le e）a as s常常可可与与w wh he en n，w wh hi il le e通通用用，但但强强调调“一一边边、一一边边”。例例如如：A As s (w wh he en n,w wh hi il le e)I I w wa as s w wa al lk ki in ng g d do ow wn n t th he e s st tr re ee et t,I I n no ot ti ic ce ed d a a p po ol li ic ce e c ca ar r i in n f fr ro on nt t o of f N Nu ummb be er r 3

8、37 7.第5页/共42页 when when引导的状语引导的状语从句中的主语与主句主语一致从句中的主语与主句主语一致，从句中是，从句中是“主语主语+be+be动词动词”结构时，这时主语和结构时，这时主语和bebe动词动词可以省略可以省略。例如：。例如：When(When(he washe was)young,he worked for a rich man.)young,he worked for a rich man.when when有时代替有时代替if if，引导条件句，引导条件句，意为，意为“如果如果”、“假如假如”，例如：，例如：Ill come when(if)Im free.I

9、ll come when(if)Im free.第6页/共42页2、before 的特殊用法before作连词一般表示时间，意为“在之前”，但有些句子中这样译就显得别扭。试看以下句子的翻译：He almost knocked me down before he saw me.他几乎把我撞倒才看见我；Before I could get in a word he had measured me.我还没来得及插话，他已经给我量好了尺寸。拓展：有关before特殊句型用法第7页/共42页1）It will(not)be+时间段+before+从句（现在时）意思是“要过一段时间才/用不了多长时间就”I

10、t will not be long before we meet.要不了多久我们就会见面的。It will be 5 days before you get your licence.你还有5天时间就拿到证来了2）It was(not)+时间段+before+从句（过去时），意思是“过了一段时间才/没过一段时间就”It was not long before our hometown was liberated没过多久我们的城镇就解放了。第8页/共42页3、till,until 用法区别用于否定句时，结构为not until(till)，主句谓语动词延续与非延续都可以，意为“直到才”。用于肯

11、定句时，只与延续性动词连用，表示“到为止”。例如：They played（延续性动词）volleyball until(till)it got dark.He didnt go to bed（非延续性动词）until(till)the his father came back.；第9页/共42页until可以放在句首，till则不行，例如：Until the last minute of the match we kept on playing.在not until 引导的倒装句中，不用till,如：Not until he finished his work did he go home.（

12、倒装）；till,until只用于时间，以下句子是错误的：We walked until/till the edge of the forest.（要用as far as或to表达）。第10页/共42页 4 4、because,since,asbecause,since,as引导原因状语时注意使用上的区别：引导原因状语时注意使用上的区别：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,because,因此因此becausebecause引导的从句往往引导的从句往往放在句末放在句末。用用whywhy提问的句子，一定用提问的句子，一定用becausebec

13、ause回答回答。例如：。例如：He had to stay at He had to stay at home yesterday because he was ill.home yesterday because he was ill.；如原因已为人们所知，或不如句子的其他部分重要，就用如原因已为人们所知，或不如句子的其他部分重要，就用asas，或，或 sincesince。sincesince比比asas更正式些。更正式些。asas和和sincesince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asas译成译成“由于由于”，sincesince译成

14、译成“既然既然”第11页/共42页例如：As you are tired,you had better rest.Since everyone is here,now lets begin.5、although和thoughalthough和though引导让步状语从句往往用法一样，但注意以下区别：although用于各种文体，而though则多用于非正式的口语或书面语中。注意由although,though引导的从句后，主句不能用but，但可用副词yet,still。例如：Although/Though it rained all the morning,they still went on

15、 working.（或yet they went on working）第12页/共42页 though though常与常与eveneven连用，构成连用，构成even though even though 短语，短语，even thougheven 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 althougheven although，例如：，例如：Even though I didnt understand a Even though I didnt understand a word,I kept smiling.word,I kept smili

16、ng.though though可用作可用作副词副词，意为，意为“可是，然而可是，然而”，常用逗号与句子分开。例如：，常用逗号与句子分开。例如：It was a quiet party,I had a good time,It was a quiet party,I had a good time,thoughthough.althoughalthough则不能这样使用，它只作连词。则不能这样使用，它只作连词。第13页/共42页6、once用法once作副词译“曾经”，作为连词译“一旦”，引导条件状语从句。相当于if的加强形式。例如：I dont believe he was once a t

17、hief.(once这里是副词)Once Aristotle had made up his mind that heavy objects always fell faster than light objects,he taught it as a truth to his students.(once连词)第14页/共42页7、unless引导条件状语从句等于if not。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

18、He had never been praised before _he went to university.A unless B.until C.when D,ifB.Until从句中时态：主将从现第15页/共42页8、在用as if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。例如：He talks as if he knew all about it.但有时也可用直陈语气。例如：It looks as if it is going to rain.第16页/共42页9、whether,if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时，用whether，不用if。例

19、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.第17页/共42页 whether可接不定式，而if则不可。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，而if则不可。例如：

20、Everything depends on whether we have enough money.Whether he will come,I am not sure.whether和if均可引导宾语从句，whether引导的宾语从句一般都是肯定句，if引导的宾语从句可以是肯定的，也可以是否定的（此时不能用whether），例如：Could you tell us whether/if it rains in winter in Australia?I wonder if it doesnt rain.第18页/共42页 引导宾语从句的whether和if常可与or not连用。连用时要注

21、意or not的位置，有时候与 whether、if分开使用，有时它可与whether合起来使用，但不能与if合起来使用。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if）if可用来引导条件状语从句，译“如果”，whether则不行。例如：If you work hard,you are sure to succeed.第19页/共42页10、as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“当时”。例如：As(he was)a yo

22、ung 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“象一样”。例如：We must do as the Party teaches us.as引导原因状语从句。意为“由于”，例如：As you are tired,you had better rest.as引导让步状语从句。意为“虽然”、“尽管”Child as he is,he can do it well.(=Although he is a child,he can do it well.)另外，as做为关系代词还

23、可以引导定语从句，如：I have the same book as you.第20页/共42页 专项巩固-连词 请同学们做试卷上的习题第21页/共42页练习、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 nor B.Either you go orC.Whether you go or D.Both you go and3.They had camped露营 once before,_ they knew what to ta

24、ke.A.because B.now C.so D.since第22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 working in the fields.A.they B.but they C.and theyD.so they6._we have satisfied you,you have no grounds理由 of complaint.A.So B

25、.Since that C.Now that D.By now.第23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.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 o

26、f the audience,_ we had expected,was well over twenty thousand.A.as B.what C.that D.whom第24页/共42页11.I thought he hated the TV.You are right,_ he still watches the program.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 h

27、eard 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第25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

28、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 for months,_ he could not find any work.A.and B.yet C.or D.and but第26页/共42页19.Hurry up,_ youll be late.A.or B.and C.so D.yet20.Do not make

29、 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 attention _ to industry _ to agriculture.A.either,or B.neither,nor C.not,but D.both,and第27页/共42页23.He ran off_ I could stop him.A.before B.after C.since

30、 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.since D.when 26._ the problem of method is solved,talking about the task is useless.A.Until B.SinceC.AfterD.Unless第28页/共42页27.We have produced 15%more cot

31、ton 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 that29.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

32、第29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.if C.how D.where33.He spoke loudly _ the audience could hear him clearly.A.so B.that C.so that D.in order to第30页/共42页34.The book is not easy._ its rather difficult.

33、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 well.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第31页/共42页37.We must do _ the

34、 people want us to do.A.whatever B.however C.wherever D.whenever38.You are certainly right,_ others may say.A.what B.whatever 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第32页/共42页41

35、._ you work,you must always serve the people heart and soul.A.Wherever B.Whenever C.Where D.When42._you understand this 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

36、 when D.No matter where第33页/共42页44.We can surely overcome these difficulties _,_ we are closely united.A.so far as 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 we

37、ll as B.so long as C.as far as D.as soon as第34页/共42页47.That is not _ I want.A.that B.why C.what D.whose48._ 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

38、am sure _ you said is true.A.what B.that C.which D.who第35页/共42页52.The trouble is _ we can not find such 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

39、it _ you get there.A.while B.as C.when D./第36页/共42页56.Dont try to get off the bus _ it has stopped.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 Engl

40、ish.A.While B.When C.Since D.After第37页/共42页59.Things have changed a lot _ I wrote to you 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

41、 are nothing _ we are not afraid of them.A.for B.as C.if D.whether第38页/共42页63.The doctor 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.after

42、66.You will find friendly people _ you go in China.A.where B.and C.wherever D.so67._ it was already dark,they went on working in the fields.A.If B.Whether C.But D.Though第39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

43、.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第40页/共42页连 词15 ABCDA 610 CDACA 1115 ACDBA 1620 BCBAB 2125 CDABC 2630 BBABC 3135 DACBC 3640 AABCD 4145 AAABC 4650 DCDBC 5155 ABBBC 5660 DDCBA 6165 CCDBA 6670 CDBAC第41页/共42页感谢您的观看！第42页/共42页