初中英语语法之连词ppt课件

连词(Conjunction)1连词(Conjunction)一、连词定义:用来连接词、短语或句子的词。e.g.IstudyEnglishandChinese.Doesheworkatschoolorinthehospital?Igetupearly,butmybrothergetsuplate.2三、用法1.并列连词---连接具有并列关系的词，短语或句子。常见的有：(1)表并列关系的and,both…and,notonly…butalso,neither…nor，aswellas（也，和）等。(2)表选择关系的or,either…or等。(3)表转折关系的but,however等。(4)表因果关系的for,so等。3考点一：1）判断改错：Theysatdownandtalkaboutsomething.Theystartedtodanceandsang.Isawtwomensittingbehindandatethere.FFFeatingsingtalkedand(“和，并且”)与or(“否则”)“and”连接平行结构。4（1）肯定句中用“and”表“和”；（2）否定句中用“or”表“和”。2）翻译：①我喜欢英语和数学。②我不喜欢英语和数学。IlikeEnglish_____math.Idon’tlikeEnglish____math.andor5=Studyhard,_____yourmathwillbeworse.3）用“and”或“or”填空：Studyhard,_____yourmathwillbebetter.andor“and”意为“这样，那么”；“or”意为“否则”。61.Whichdoyoulikebetter,apples,__pears?A.andB.butC.or2.Nowwehavenotime_____money.A.soB.andC.oror:1.用于疑问句,表选择2.用于否定句,表并列（肯定句用and）3.Christine,Aileen_____(和)Iaregoodfriends.Studyhard,______(否则)you’llfallbehind.4.Areyoucomingbybus____(或者)onfoot?andoror71.It’sgettingwarmer__warmer.A.andB.butC.or2.Heorthetwins__theUSA.A.comesfromB.comefromC.isfrom4.NotTombutI___goingtogivethetalk.A.amB.isC.areadj.比+and+adj.比表示越来越…AorB和notAbutB结构作主语时，谓语动词要使用就近原则。and,or,but,so特殊用法8表转折的连词but和however：e.g.(他努力工作，但以失败告终。)Heworkedhard,______hefailedatlast.Heworkedhard._________,hefailedatlast.区别:but后没有逗号，直接连接分句；however后有逗号相隔，可放句末。butHowever考点二：9观察句子：（1）Althoughheisoversixty,butheworksashardasothers.改为：Althoughheisoversixty,heworksashardasothers.或Heisoversixty,butheworksashardasothers.（2）“BecauseJohnwasill,soItookhimtothedoctor.”*although/though和but这两个关联词不能同时用。???同样，此句错误，because和so等关联词都不能同时使用。考点三：10eitherAorB“或者A或者B”neitherAnorB“既不A也不B”notonlyAbutalsoB“不仅A而且B”---连词词组：①EitheryouorI_____goingtotheparty.(或者你或者我将去晚会。)②NeitherInorhe______seenthemovie.（我和他都没有看过这部电影。）③Notonlyyoubutalsohe________French.（不但你而且他也讲法语。）【连接主语时，谓语“就近原则”】amhasspeaks考点四112.从属连词---用来引导从句。常见的从属连词有：(1)引导时间状语从句的after,before,when,while,as,until,till,since,assoonas等。(2)引导条件状语从句的if,unless等。(3)引导原因状语从句的because,as,since等。(4)引导目的状语从句的sothat,inorderthat等。(5)引导让步状语从句的though,although,evenif等。(6)引导结果状语从句的sothat,so…that,such…that等。(7)引导比较状语从句的than,as…as等。(8)引导宾语从句的that,if,whether等。12三者均可译为“在……时候”。when引导的从句，动词既可以是延续性的，也可以是终止性的。一般来说，当主句的动作正在进行时，when引导的从句的动作才发生；while引导的从句中，动词只能是延续性的，一般来说，当while引导的从句的动作正在进行时，主句的动作才发生；若主从句动作同时发生，且强调“一边一边”这样的意思，一般用as。WhenIcameintotheroom,Ifoundhimlyingthereasleep.Shesangasshewalked.她一边走一边唱歌。注意：while可以表示对比关系“然而”。Heisshortwhilehisbrotheristall.when，while，as连词用法比较13Mr.Whitewastakingashower_____theUFOlandedonthestreet.A.whereB.whileC.whenD.whetherCWhileMr.Whitewastakingashower，theUFOlandedonthestreet.考点一“when”和“while”when引导的状语从句的动作多为终止性动词，也为可持续动词；但while只能是可持续动词。14考点二我父亲直到我们吃完饭时才回来。Myfather______comebackuntilwehadsupper.not…until/till直到……才…till直到……为止翻译：他直到3岁才会讲话。He______getupuntilhismotherwakeshimup.didn’t他经常等到妈妈叫他才起床。He_________speakuntilhewas3.couldn’tdoesn’t151)so…that中的so是个副词，其后只能跟形容词或副词而such...that中的such是个形容词，后接名词或名词短语。例如：I’msotiredthatIcan’twalkanyfarther.Itwassuchawarmdaythathewentswimming.2)如果在名词之前有many,much,little,few时，用so,不用such。例如：Hehassolittleeducationthatheisunabletogetajob.so…that,such...that连词用法比较16HetooktheMP3playerwithhim_____hecouldenjoymusicduringthetrip.A.becauseB.sothatC.whenB考点三他起早是为了赶上早班车。(表目的)①Hegotupearlysothathecouldcatchtheearlybus.②Hegotupearlysothathecaughttheearlybus.他起早，结果赶上了早班车。（表结果）Hegotupsoearlythathecaughttheearlybus.so…thatsothat：①为了；②所以，结果如此……以致17if和whether都可作“是否”讲，在引导宾语从句是一般可互换。例如：Iwonderwhether(if)youstillstudyinthatschool.在下列情况下，只能用whether,不能用if：①.在不定式前。例如：Ihaven’tmadeupmymindwhethertogothereornot.②.与or(not)连用时。例如：Idon’tnowwhetherhecomesornot.③.从句作介词宾语时只用whether不用if。Itdependsonwhetheritwillbefine.那得看是不是晴天。④.作discuss等动词的宾语时，用whether不用if。Wediscussedwhetherweshouldclosetheshop.我们讨论是不是该关掉商店if,whether连词用法比较18连接条件状语从句：1、You’llbelate_____(如果)youdon’tgetupearlytomorrow.2、I’llcometoseeyou_______(如果)I’mfreenextSaturday.3、We’llhaveapicnictomorrow_______(如果)itdoesn’traintomorrow.*注意状语从句的时态：“主将从现”。ififif连词练习19连接时间状语从句1.Iwascleaningthefloor_____(当…的时候)sheknockedatthedoor.2.Dickclimbedupintoatree_________________(一…就)hesawthebear.3.Iknewnothingaboutit_____(直到…才)myfriendtoldmeyesterday.4.Ihaven’theardfromBill______(自从)wegraduatedfrommiddleschool.whenassoonasuntilsince20连接原因、结果状语从句1.YoushouldreturnthedigitalcameratoSally_____shewillnotbeangry.A.sothatB.becauseC.before2.Hewashurt____badly_____hehadtoseeadoctor.A.too…toB.so…thatC.sothat3.Hetookoffhiscoat______itwastoohotintheroom.A.AndB.sinceC.but4.Solomissedthebus____hewaslateforschool.A.becauseB.soC.or21连接让步状语从句1.Tomisstilldoinghishomework___itisverylate.A.sothatB.eventhoughC.if2.Ineverseemtoputonanyweight,____hardItry.A.thoughB.nomatterhow3.IenjoylearningEnglish,__ittakesmealotoftime.A.unlessB.althoughC.because4.IwillnevergiveuplearningEnglish___________(即使)itisdifficult.eventhough221.I’lltellyourfatherthetruthassoonashe___here.A.arrivesB.arrivedC.arrivesat2.Wedon’tknowifhe___usforthepicnic.I’llcallyouifhe____.A.joins;comesB.willjoin;comesC.willjoin;willcome3.Nobodyknowswhenthewindows___.ButI’lltel