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第一篇词法五、连词复习要点1.知识概要2.连词一览表3.常用并列连词的用法1）and2）both…and3）notonly…butalso4）aswellas5）nor6）but7）however,still,yet8）while9）or10）either…or/neither…nor11）so12）then13）for4.常用从属连词的用法1）that2）when,while,as3）after/before4）since5）till/until6）assoonas7）because/since/as8）so/such…that9）if10）unless=ifnot11）though/although12）as…as/than14）as13）whether/if14）so/suchthat3.常用近义连词的用法辨析（1）while,when,as（2）as,because,since,for（3）if,whether（4）so…that,such...that（5）either…or…,neither…nor,notonly…butalso…（6）although,but（7）because,so4.正误辨析5.例题解析6.课时训练知识概要用来连接词、短语、从句或句子的词叫连词。连词是一种虚词，在句中不能单独使用。连词可分为两类：并列连词和从属连词。连词一览表作用主要连词并列连词表并列关系and,both…and,notonly…butalso,neither…nor等表选择关系or,either…or等表转折关系but,however,while(而)，only(只不过)等表因果关系for,so，therefore(因此)，then（那么）等从属连词引导时间状语从句after,before,when,while,as,until,till,since,assoonas等。引导条件状语从句if,unless等引导原因状语从句because,as,since等引导目的状语从句sothat,inorderthat等引导让步状语从句though,although,evenif等引导结果状语从句sothat,so…that,such…that等引导比较状语从句than,as…as等引导名词从句that,if,whether等难点链接1.常用并列连词的用法1）and连接语法作用相同的部分.如：LetmeknowwhatyousawandheardinEurope.如果连接的两个名词是指同一个人而有两种身份时,第二个名词前不要加冠词或所有格.如：Herhusbandisasingerandsongwriter.祈使句+and代替条件句.如：Workhardandyouwillpasstheexamination.由and连接两个主语时谓语动词要用复数形式。如：YouandIarefromChina.但是，and前面的主语之前有every,each,no,manya的时候用单数谓语动词.如：Everytrainandbuswascrowdedwithmanypeople.2）both+主语+and+主语+“复数谓语动词”。如：BothTomandJerryaregoingtothecinema.3）notonly…butalso如果连接两个主语,谓语动词临近原则.如：Notonlyhebutalsohisparentsareverykindtome.4）aswellas后面的主语不作为成分.如：Thisstudy,aswellasmanyotherreports,showsthatcancercanbecured.后面如果接动词一定要用动名词.如：Shesingsaswellasplayingthepiano.5)nor是否定连接词,后面接的句子应倒装.如：Idon'tknow,nordoIcare.6）but用来表示转折,如：Hetriedhardbuthewasunsuccessful.还可以用在noone,none,nobody,nothing,all,every等词之后表示”除了…以外”。如：Alltheboysbutonearehere.难点链接7）however,still,yet,含意相同相当于”but…anyway”.如：Thecarwasold,yetitwasinexcellentcondition.Shehasherweaknesses,yet(but)thatdoesn'tmeansheisnotgoodforthejob.Heliedtome,Istillbelievehim.8)while表示的是”相反的”,也可以用but,however,ontheotherhand来代替.Whilesomepeoplehavenothingtoeat,otherseattoomuch.9)or连接句子或词组,表示“或者”之意。Whichdoyouprefer,yellow,blueorred?Washeangry,orwashepretending?or,也有“否则”的意思.如：Bequick,oryouwillbelate.10)either…or/neither…nor和notonly…butalso并列主语时，谓语动词同样用就近原则.EitherMaryorherparentsaregoingbybus.Thereisneitherelectricitynorfreesuppersinthehotel.NotonlyyoubutalsoIamfromchina.11）so表示因此,相当于therefore.（adv.）如：Theycostalotofmoney,sousethemcarefully.Itisverycold.Therefore,weshouldstayhere.12）then（adv）然后，而后，其次如：IdroppedinatherhouseandthenIwenthome.13）for引导的句子不可以放在句首，之前必须由逗号，表示推论的理由Theymustbegoodfriends,fortheyarealwaystogether.Thedaybreaks,forthebirdsaresinging.难点链接2.常用从属连词的用法1）that引导名词性从句(主语/宾语/表语从句),同位语从句，定语从句,…如：Thatsmokingcancausecancerisknowntoall.Iwassurprisedtohearthathebecamethepresident.2）when,while,aswhen在---时刻或时期，可指时间点或时间段，从句动词是终止或持续动词。WhenIgothome,hewashavingsupper.WhenIwasyoung,Ilikeddancing.as表示“边---边---”或“与---同时”表示动作同时发生伴随进行。动词相似,如终止性动词为从句，则主句也为终止性动词。Theytalkedastheywalked.while表示只是时间段，不是时间点，从句的动词只限于持续动词。WhileIslept,athiefbrokein.when可以表示主句和从句先后发生.Whenhehasfinishedhiswork,hetakesashortrest.when从句为终止动词不能用while替换When。hecameyesterday,wewereplayingbasketball.如从句动词为终止性动词，主句也是终止性动词when和as可以互换。HecamejustasIreachedthedoor.难点链接3）after/beforeAfterherhusbanddiedshehadtotakeeverythingonherself.Takethemedicinebeforeyougotobed.4）since引导的从句是肯定句,一般主句都是完成时.Shehashadanotherbabysincewemet.5）till/until其中until较为常用,till是口语.Untilyoutoldme,Ihadheardnothingofwhathappened.Iwon'tgountilhecomes.6）assoonasI’lltellhimthenewsassoonasIseehim.7）because/since/as表示直接原因的时候不能用since或as.其他情况可以用since—既然，as—由于（语气弱）。Itwasbecausehewasillthathedidn'tgotoschool.8）so/such…that结果状语从句(程度)Shewassomovedthattearscametohereyes.Theytooksuchcareofherthatnotlongaftershewasrestoredtohealth.难点链接9）if(假如,如果)不能用whether.Ifyoucallhimafatty,hewillgetangry.10）unless=ifnotYoucannotinterviewhimunlessyougetthepermission.11）though/although都作为”虽然,尽管”可以互换,although用的更多一些.后面不可以有but但可以有yet/still.Althoughheismuchbetter,yethisfatherisn'tsatisfied.12）as…as/than（用于比较状语从句中）14）as可以引导状语从句AsIremember,heusedtoworkheretenyearsago.AsIseeit,thereisstillmuchroomforimprovementinourwork.13）whether/if(是否)if能引导宾语语从句Pleasetellmewhetheritistrueornot.Ihaven'tdecidedwhether/ifI'llgowithyou.在介词后,名词后,不定式前和有ornot的句子中用whether.Iamworriedaboutwhethersheishappy.14）so/suchthat（结果状语从句／目的状语从句）,inorderto/that…目的状语从句Theysetoutearlysothattheymightarriveintime.目的状语从句SayslowlysothatIcanunderstandit.Itwasraining,sothatwecouldnotgoout.结果状语从句（原因）难点链接3.常用近义连词的用法辨析（1）while,when,as这三个连词都可引导时间状语从句，但用法有所不同。1)当某事正在进行的时候，又发生了另一件事。While,when,as都可用来引导表示“背景”的时间状语从句。例如：As/When/WhileIwaswalkingdownthestreetInoticedapolicecar.2)当两个长动作同时进行的时候，最常用的是while。例如：Whilemotherwascookinglunch,Iwasdoingmyhomework.3)当两个动作都表示发展变化的情况时，最常用的是as。例如：Aschildrengetolder,theybecomemoreandmoreinterestedinthingsaroundthem.4)当两个短动作同时发生时，或表示“一边…一边…”时，最常用as。例如：Justashecaughtthefly,hegavealoudcry.Shelookedbehindfromtimetotimeasshewent.5)当从句的动作先于主句的动作时，通常用when。例如：Whenhefinishedhiswork,hetookashortrest.6)当从句是瞬间动作，主句是延续性动作时，通常用when。例如：WhenJ