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解析二十组易混连(接)词  

2011-06-16 07:38:04|  分类: 语法习题专练 |  标签: |举报 |字号 订阅

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一、特殊并列连词while\when
  【例1】I had just stepped out of the bathroom and was busily drying myself with a towel____ I heard the steps.
  A.while B.when  C.since D.after
  【例2】I’d like to study law at universitymy____ cousin prefers geography.
  A.though  B.as  C.while  D.for
  【答案与解析】BC。作并列连词时,when\while用法较为特殊,二者区别是:while表两相对照;而when表突然、在那时,常见于be about to do...when和Hardly...when等句型中。
  二、表示原因的连词for\because\as\since
  【例3】He found it increasingly difficult to read,____his eyesight was beginning to fail.
  A.and B.forC.butD.or
  【例4】Jenny was very sad over the loss of the photos she had shot at Canada,____this was a memory she especially treasured.
  A.asB.ifC.whenD.where
  【例5】 Parents should take seriously their children’s requests for sunglasses_____eye protection is necessary in sunny weather.
  A.becauseB.thoughC.unlessD.if
 【例6】_____everybody knows about it,I don’t want to talk any more.
  A.ForB.EvenC.SinceD.However
  【答案与解析】BAAC。引导原因状语从句,as\because\since\for的区别是:because语势最强,用来说明人所未知的原因,回答why提出的问题,可置于强调句中且其前可加修饰语;since是双方都知晓原因或经过分析而得之的原因,语气次之;for是并列连词,前用逗号隔开,表逻辑推理或补充说明;as语气最弱,原因是显而易见的或已为人们所知,即已知原因,所引导的分句可置于句首。
  三、并列连词but\yet\though
  【例7】Excuse me for breaking in,______I have some news for you.
  A.so B.and C.but D.yet
  【答案与解析】C。but和yet是连词,可等同使用,但也有区别。yet与and连用,构成and yet,但but却无此用法;在“Excuse me\I’m sorry\I hope you don’t mind…but’’中,只用but,不用yet。因为在表示对照或对立时,but较为轻松自然;而yet却较为强烈,常出人意料;though作并列连词时,只能引导分句且其前须加逗号。例:
  I’ll try to come,though I don’t think I shall manage it.
  四、引导名词性从句的从属连词that\whether\if
 【例8】The traditional view is_____we sleep because our brain is “programmed” to make us do so.
  A.whenB.whyC.whetherD.that
 【例9】We haven’t settled the question of______ it is necessary for him to study abroad.
  A.if B.where C.whetherD.that
  【答案与解析】DC。引导名词性从句的从属连词that与whether的区别是:句子成分完整且表意确定时选用that连接,句意不确定时选用whether\if连接;借助it,将真正主语或宾语后置,构成“It…that”句型,但whether\if不可;下列情形用whether不用if:与or not连用,中间无其他词隔开;作介词宾语;在主语从句、表语从句和同位语从句中。例
  Whetherwe’ll go camping tomorrow depends on the weather.
 五、表示比较的从属连词what\as
 【例10】Engines are to machines______hearts are to animals.
  A.asB.that C.whatD.which
  【例11】______I explained on the phone,your request will be considered at the next meeting.
  A.WhenB.AfterC.AsD.Since
 【例12】What a table! I’ve never seen such a thing before.It is______it is long.
  A.half not as wide as B.wide not as half as
  C. not half as wide as D.as wide as not half
  【答案与解析】CCC。what用作从属连词,表比较,用于A is to B what C is to D结构中;而as表示原级比较,常用于as…as结构中,程度修饰语应置于第一个as之前,嵌入的形容词或副词使用原级。另外还表“正如、按照”,引导方式状语从句。
  六、表示条件的从属连词if\unless\as long as\once
  【例13】______I know the money is safe,I shall not worry about it.
  A.Even though B.Unless C.As long as D.While
 【例14】Small sailboats can easily turn over in the water_______they are not managed carefully.
  A.thoughB.beforeC.untilD. if
 【例15】You will be successful in the interview___ you have confidence.
  A.beforeB.onceC.untilD.though
  【例16】I won’t call you,_____something unexpected happens.
  A.unlessB.whetherC.becauseD.while
  【答案与解析】CDBA。表条件的连词if\unless\as long as\once在用法上存在一些差异。as long as用法同only if\on condition that,强调某事的发生以另一事件的发生为前提;if为正面条件,可能会产生好的或坏的结果,若某种条件产生坏的结果,此时的if可用as long as替换;unless为反面条件,表示除非,如果不,故在真实条件句中常和if…not换用;once既表时间,又包含条件,译作一旦。
七、表示让步的从属连词although\when\while
 【例17】We had to wait half an hour ___ we had already booked a table.
A.sinceB.although C. until D.before
  【例18】______I really don’t like art,I find his work impressive.
  A.As  B.Since  C.If  D.While
  【答案与解析】BD。although\when\while均可表示让步,后两者的用法较为特殊。although/though引导让步状语从句时不与but和yet连用;而while却表示“部分接受,但并非全部”,或用于“强调两种情况、活动等之间的差距”;when也可表示虽然,尽管,同even if,常置于句末。例:
(1)While I accept that he is not perfect,I do actually like the person.
(2)He walks when he might take a taxi.
  if用作从属连词,也可表让步,类似though,用以描述自己喜爱的人或物。如:He’s a pleasant child,if a little spoiled.
  八、从属连词so that\in case
  【例19】I’d like to arrive 20 minutes early______I can have time for a cup of tea.
  A.as soon as  B.as a result  C.in caseD.so that
 【例20】Leave your key with a neighbor____you lock yourself out one day.
  A.ever sinceB.even if C.sooner after D.in case
  【答案与解析】DD。so that既表示结果又表示目的。若置于主句后,用逗号隔开常表结果;与情态动词连用常表目的。in case表示假设,译作“万一”。例:
  I always take something to read when I go to the doctor’s in case I have to wait.
  九、关联连词so/such…that
   【例21】Pop music is such an important part of society________it has even influenced our language.
  A.as B.thatC.whichD.where
  【例22】_______homework did we have to do that we had no time to take a rest.
  A.So muchB.Too much C.Too littleD.So little
  【答案与解析】BA。关联连词so/such…that(如此……以致),只表结果,置于句首时,主句要部分倒装;so为副词,后续形容词或副词。such后续名词,名词前可接限定词;such that可表程度。例:Her cruelty is such that we all hate her.
  十、表原因的从属连词now that\in that
  【例23】_______you’ve got a chance,you might as well make full use of it.
  A.Now thatB.After C.AlthoughD.As soon as
  【答案与解析】A。now that既然,从now可知,使用时应注意时间;in that表“在于”,属正式用语,不置于句首。例:
  Human beings are different from animals in that they can use language as a tool to communicate.
  十一、表时间的从属连词when\while\as
  【例24】-______I’m going to the post office.
  -________you’re there,can you get me some stamps?
  A.As B.WhileC.BecauseD.If
  【例25】Mother was worried because little Alice was ill,especially ________ Father was away in France.
  A.as  B.thatC.during D.if
  【例26】—Where’s that report?
 —I brought it to you_______you were in Mr.Black’s office yesterday.
  A.ifB.when C.becauseD.before
  【答案与解析】BAB。when\while\as用法区别是:主从句动作先后发生用when;两个较长动作同时发生用while,从句谓语动词为延续性动词,还可译作“趁着”;特别强调主从句动作同时发生时用as,译作“一边……一边”,as还可表“随着”。例:
  (1)Strike while the iron is hot.
  (2)As the day went on,the weather got worse.
  十二、表时间的从属连词since\until\before
  【例27】It is difficult for us to learn a lesson in life______we’ve actually had that lesson.
  A.untilB.afterC.sinceD.when
  【例28】That was really a splendid evening.It’s years_____I enjoyed myself so much.
  A.whenB.thatC.beforeD.since
  【答案与解析】AD。since\until\before强调的时间不尽相同,since表示“自从……以来”,until表示“直到……止”,before表示“在……之前”;若主句谓语动词为非延续性动词的否定式,使用until和before基本上没有区别。例:He didn’t leave until\before the rain stopped.
  十三、表时间的从属连词before\after
 【例29】 The field research will take Joan and Paul about five months;it will be a long time _____we meet them again.
  A.afterB.beforeC.sinceD.when
  【答案与解析】B。连词before和after表示时间的差异是:before表“在……之前”,此词在具体语境中有不同含义,可译作“宁愿、不知不觉、要不然、否则”等。尤见于“It will be\was+时间+before…,”句型中;而after表“在……之后”,与before相反。
十四、表示时间的句型It’s+时间+when\since\before\that中连词
  【例30】-Did Jack come early last night?
  -Yes.It was not yet eight o’clock_____he arrived home.
  A.beforeB.whenC.thatD.until
  【例31】 It wasn’t until nearly a month later_____I received the manager’s reply.
  A.sinceB.whenC.asD.that
  【答案与解析】BD。例30题考查从属连词,涉及句式结构“It’s…when”从句的用法。when常接在时间名词之后。句意:他到家时还不到八点。注意句型It’s+时间+when\since\before\that中连词的选择。若将it、 be动词和连接词删除,整个句子句意完整,那么此句为强调句,否则为时间状语从句或名词性从句。
 十五、关联连词no sooner…than…\hardly…when…
  
  【例32】-Did Linda see the traffic accident?
  -No,no sooner_____than it happened.
  A.had she goneB.she had gone  C.has she goneD.she has gone
  【答案与解析】A。no sooner…than…和hardly…when…相当于as soon as之意,从句谓语动词用一般过去时,主句谓语动词用过去完成时。置于句首时,主句的谓语要部分倒装。例:
  Hardly had he got into the room when the telephone rang.
  十六、引导让步状语从句的连接词however\no matter how
 【例33】This is a very interesting book.I’ll buy it,_____.
  A.how much may it cost B.it may cost
  C.however much it may cost  D.how may it cost
  【答案与解析】C。however\no matter how的区别是:前者可引导名词性从句和让步状语从句,而后者只能引导状语从句。另外,however还可用作连接副词,与标点符号连用,表示然而。
  例:“Maybe I should drop out,” I thought as I moved on.However,I decided to keep going.
  十七、连接词even if\as if
 【例34】Allow children the space to voice their opinions,_____they are different from your own.
  A.untilB.even if C.unlessD.as though
  【答案与解析】B。even if与as if只是形似,意义上差别很大。前者引导让步状语从句,用法同even though;后者引导方式状语从句,表“似乎”。例:
  Elize remember everything exactly as if it happened yesterday.
 十八、引导名词性从句连接词what\that
【例35】There is much chance_____Bill will recover from his injury in time for the race.
  A.that  B.which  C.until  D.if
  【例36】_____matters most in learning English is enough practice.
  A.WhatB.WhyC.WhereD.Which
  【答案与解析】AA。what与that区别是:前者担任句子成分,有一定意义;后者不担任句子成分,无具体意义,只起连接作用,宾语从句中常省略,其他从句中不可省略。
  十九、引导定语从句的when\since when
 【例37】The book was written in 1946,_____the education system has witnessed great changes.
  A.when B.during which  C.since thenD.since when
  【答案与解析】D。前后句用逗号隔开,为主从关系,排除选项C;从定语从句时态上考虑,只有since常与完成时连用,故排除选项A和B。when除用作关系副词引导定语从句外,还可用作代词,和介词since\by等连用,可引起疑问句或定语从句。又如:Since when has the country been open to international trade?
  二十、引导名词性从句连接词what\which
 【例38】There are so many kinds of tape recorders on sale that I can’t make up my mind_____to buy.
  A.whatB.whichC.howD.where
 【例39】It is none of your business_____other people think about you.Believe yourself.
  A.howB.whatC.whichD.when
  【答案与解析】BB。what与which共同点是均可指“什么”,担任句子成分,起连接作用;不同点是:what指不定范围的“什么”,而which指一定范围内的“什么”,常译作“哪一个”。
 
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