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句子类型一、简单句：简单句是指由一个主语（或并列主语）和一个谓语（或并列谓语）构成的句子。二、复合句：复合句是指由一个主句和一个或一个以上的从句构成的句子。从句分为宾语从句、状语从句、定语从句。如：Igetupatsixinthemorning.MymotherandIoftengoshopping.wesinganddancehappilyeveryday（一）什么是状语从句状语从句在复合句中作状语,来说明一件事情发生的时间,地点,原因,条件,结果等.（二）状语从句的分类：时间，地点，条件，原因，让步，目的，方式，结果，比较二、状语从句：1、引导时间状语的从属连词(1)When“当……时候”,从句用一般过去时，主句用过去进行时。从句的动词可用延续性/短暂性动词。e.g.她到达车站时，天正在下雨Itwasrainingwhenshearrivedatthestation.(2)While“正当……时”，引导从句时，谓语动词必须是延续性的，常用进行时。e.g.他在读书时不要制造噪音。Don’tmakeanynoisewhileheisreading.(3)until“直到……”，谓语动词是延续性的。notuntil“直到……才”，谓语动词是短暂性的。e.g.他经常看书到十一点。Heoftenreadsuntileleveno’clock.e.g.直到会议结束他才出现。Hedidn’tappearuntilthemeetinghadbegun.(4)after“在……之后”e.g.填完这张表格后，请来我的办公室。Pleasecometomyofficeafteryoufinishthisform.(5)before“在……之前”e.g.你走之前要说再见。Saygoodbyebeforeyougo.(6)assoonas“一……就”，引导的从句常用一般现在时，主句用一般将来时。e.g.我一回来就去拜访你。I’llvisityouassoonasIcomeback.2、引导原因状语的从属连词(1)because“因为”,回答why提出的问题。语气较强,强调说话人认为某一原因是对方不知道、需作陈述的原因。—Whywereyoulateforclasstoday?—BecauseIgotuptoolate.(因为我起床太晚了)(2)since“既然”，用于双方都知道的原因。e.g.既然他这么说，那一定是真的。Sincehesaysso,itmustbetrue.(3)as“由于，因为”，相当于since，但语气更弱，用来表示很明显、提一下也就清楚地原因。e.g.由于天越来越黑，妈妈开始为哥哥着急。MotherbegantoworryaboutmybrotherasItwasgettingdark.3、引导目的和结果状语的从属连词(2)结果状语从句：①so+adj/adv+that…“如此……以至于”。e.g.她太累了，不能再走了。Sheissotiredthatshecan’tgoanyfurther.②such+a/an+adj+n+that…“如此……以致……”e.g.天气那么好，许多人都到公园里来玩。It’safinedaythatmanypeoplegototheparkforfun.③such+adj+cn/un+that…“如此……以至于”(1)目的状语从句：sothat“为了，以便”e.g.你现在必须离开是为了你能赶上早班车。Youmustleavenowsothatyoucancatchtheearlye.g.他吃了不健康的食品结果他病了Heatesuchunhealthyfoodthathewasill.4、引导让步状语从句的从属连词though,although,eventhough(if)“虽然，尽管”引导让步状语从句时不能与but同时连用。e.g.尽管雨下得很大，他还是出去了。Althoughitrainedhard,hestillwentout.e.g.尽管我有时间，可我并不想跟他去哪。EventhoughIhaveenoughtime,Idon’twanttogotherewithhim.5、引导条件状语从句的从属连词（1）If意为“如果，假如”，表示条件，if引导的句子是条件状语从句，用一般现在时态，主句则用一般将来时态。也就是所谓的“主将从现”。•Ifyoueatless,youwillbethinner.•Ifyouworkhard,youwillbesuccessful.•Ifyoucometoschoollate,yourteacherwillbeangrywithyou.(2)unless“如果不，除非”，=“if…not…”e.g.如果他不努力，就不能完成这项工作。Hewon’tfinishtheworkunlessheworkshard.2.if条件状语从句中，如果主句有must，can，may等情态动词，从句用___________。例如：Youmuststopifthetrafficlight____(be)red.is一般现在时Youwillmissthebusunlessyouhurryup．Ifyoufinishthehomework，youcangohome．如果你作业做完了就可以回家了。Ifyouwanttoloseweight，youmusteatlessbread.如果你想减肥，你必须少吃面包。例如：Don’twaitformeifI_____(be)late.3.if条件状语从句中，主句是祈使句，从句用____________表示将来。_________原则。am主祈从现一般现在时Shewillbelate.Ifshe_____toschool,she________late.Sheisgoingtowalktoschool.walkswillbeWewilltakeatripifitissunnytomorrow.=Ifitissunnytomorrow,wewilltakeatrip.主句在前从句紧跟其后。从句在前时，用“，”与主句隔开。Itisgoingtoraintomorrow.Iwillstayathome.Ifit_____tomorrow,I__________athome.rainswillstayHewon’tstudyhard.Hewillfailintheexam.“Ifhe_______studyhard.He_________intheexam.”doesn’twillfailIfIgetupat9:00,Iwillbelate.IfIamlate,myteacherwillbeangrywithme.Ifmyteacherisangrywithme,Iwillbesad.IfIamsad,Iwillcry.….Chainpractice用括号内所给单词的正确形式填空。1.I’llbuyacomputerifI_______(have)enoughmoney.2.I’msureifhe_____(go)totheparty,he________(have)agreattime.havegoeswillhave3.You___________(notget)nervousifyou_____(do)enoughexercise.4.Ifshe_______(finish)workearly,she______(go)home.5.Ifit_____(rain),we________(stay)athome.dofinisheswillgorainswillstaywon’tget1.Ifhe____________(not,doit),I___________(do)it.2.Ifyou____(be)lateforschool,myteacher___(be)angry.arewillbe3Ifshe________(win)theprize,we_______(be)happy.winswillbe4.IfI________(not,eat)somuch,I_________(get)thinner.5.Ifyou______(tell)them,they______(not,believe)you.don’teatwillgettellwon’tbelieve6I_________(stay)athomeIfit__________(rain).7.Ifit____________(not,rain),I_________(go)out.8.we__________(play)footballIfitis_________(sun).9.Ifshe________(become)astar,herparents___________(not,send)heraway10.He_________(watch)TVifhe______(be)free.willstayrainsdoesn’trainwillgowillplaysunnybecomeswon’tsendwillwatchisdoesn’tdowilldo’tdoB.won’tgoC.aren’tgoD.didn’tgo.2.Willyougototheparkifit____fine?A.willbeB.wasC.isD/3.Ifyou__toschoollate,yourteacher_____angrywithyou.A.come;areB.come,willbeC.willcome;areD.willcome;willbe4.Ifyou_____hard,youwill___successful.A.work,areB.works,isC.towork,beD.work,be5.IfI____toomuchTV,mymotherwill_______.A.watch,angryB.watched,beangryC.watch,beangryD.willwatch,beangryBCBDCII.选择()1._____yougototheparty,you’llhaveagreattime.A.AsB.AlthoughC.IfD.After()2.Idon’thavetointroducehimtoyou____youknowtheboy.A.sinceB.butC.untilD.though()3.—Iseverybodyheretoday?—No,Tomisathome____hehasgotabadcold.A.becauseB.ifC.untilD.unless()4.Moneyisveryimportant_____it’snotthemostimportantthing.A.orB.andC.soD.but()5.—Wouldyouliketocomefordinnertonight?—I’dliketo,_____I’mtoobusy.A.orB.butC.andD.So()6.Ididn’tknowhecameback_____ImethiminthestreetA.sinceB.whenC.untilD.afterCAADBC()7.MrsShutewouldn’tleavetheTVset,herchildrenwerewaitingfortheirsupper.A.eventhoughB.becauseC.ifD.assoonas()8.It’scoldoutside.Pleaseputonyourcoat_____youwillcatchacold.A.butB.andC.OrD.so()9.Insummer,foodgoesbadeasily_____itisputintherefrige