英语连词PPT

连词：主要作用是:连接单词与单词、短语与短语、句子与句子。它是虚词,不能在句子中作成分.1.并列连词2.从属连词用来连接平行的词，词组或句子。常见的并列连词有：(1)表并列关系的and,both…and,notonly…butalso,neither…nor,aswellas等。(2)表选择关系的or,either…or等。(3)表转折关系的but,however,yet等。(4)表因果关系的for,so等。一.并列连词１．and和，并且例如:1)Ioftenhavebreadandmilkforbreakfast.2)OnSundaysIwashclothesandlookaftermydaughter.3)Lucyiskindandshelikeshelpingothers.2.both….and既….又例如:BothIandshelikesleeping.neither…nor既不…也不(连接主语时要就近原则)例如:NeitheryounorLucyworkshardnotonly….butalso不但…而且(连接主语时要就近原则)例如:NotonlyMikebutalsohissisterhasbeentoLondonaswellas既…又(也),不仅…而且例如:Lilycansingaswellasdance.注意:1.在否定句中把and改为or例如:Thereisnoairorwateronthemoon.1.or,或，否则Getupearlier,oryouwillmisstheearlybus.2.either…or要么….要么(遵守就近原则)Eitheryouorhehastheticket.注意:or=ifyoudon’t,youwill.Ifyoudon’tgetupearlier,youwillmisstheearlybus.1.but但是HelivesinBeijingnow,buthishomeisinZhejiang.3.yet可是，然而,WehavestudiedEnglishfortenyears,yetwecan’tspeakitwell.2.however,但是HelivesinBeijingnow,however,hishomeisinZhejiang.1.for因为Hedidn’tgotoschool,forhewasill.2.so所以Hewasill,sohedidn’tgotoschool.(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so…that,such…that等(7)引导比较状语从句的than,as…as,less..than等。(8)引导宾语从句的if,whether,when等。二.从属连词从属连词用来引导从句。常见的从属连词有：1.after在----之后Iwillgiveyouaringafterhecomesback.3.when当-----的时候Iwillgiveyouaringwhenhecomesback.4.assoonas一-----就Iwillgiveyouaringassoonashecomesback.2.before在-----之前Iwillgiveyouaringbeforeheleaveshere.5.until/till直到----才Iwillnotleavehereuntilhecomesback.6.since自从---IhavelivedheresinceIcametoHongjia.7.as.当…时候,一边….一边..例如:ImetmyoldfriendasIwaswalkinginthestreet.8.while在..时候,而例如:WhileIwasdoingmyhomework,mybrotherwassleeping.2.unless除非Iwillgotherewithyouunlessyouagreewithme.Iwillgotherewithyouunlessmymothertellsmenotto.1.if如果Iwillgothereifitdoesn’traintomorrow.Pleasetellmeifyouknowtheanswer.2.as由于，因为语气最弱Asitisrainingheavily,you’dbetterstayathome.1.since既然，自从Sincewaterisveryimportant,wemusttryourbesttoprotectit.3.because因为语气最强Lucydidn’tgotoschoolbecauseshewasillysterday.2.inorderthatTheteacherspeaksslowlyinorderthatwecouldcatchher.1.sothat为了Theteacherspeaksslowlysothatwecouldfollowher.2.evenif/eventhough即使IwillgoandhelpthemeventhoughIstopmywork.1.though/although虽然Thoughheispoor,heishappymostofthetime.3.asif/asthough好像Hetalkedasthoughhecaredlittleformoney.1.so…..that太…..以致于Heransofastthathesooncaughtupwiththeothers.2.such…..that太…..以致于ItissuchaninterestingfilmthatIwanttoseeitagain.ThefilmissointerestingthatIwanttoseeitagain.1.as….as例如:Iamastallasyouare2.notas/so…as例如;Sheisnotas/sokindasyouare3...than…例如:Italkmorethanshedoes.4.less…thanIamlesstallthanyou.