初中英语条件状语从句语法详解

1初中英语条件状语从句语法详解(名师剖析语法知识点+实战训练题，值得下载打印)一．条件状语从句的概念条件状语从句，即在某种条件下，一件事情可能发生。在英语中由连接词if或unless等引导的状语从句叫做条件状语从句。条件是指某一件事情实现之后（状语从句中），一件事情（主句）才能发生，通常译作“假如，只要，如果”等意思。条件状语从句中，主从句的时态要遵循“主将从现”的原则。即，主句是将来时态时，从句用一般现在时代替将来时态。二.条件状语从句的引导词1.Ifconj.如果，假如Ifyouaskhim，hewillhelpyou．如果你请他帮忙，他会帮你的。Ifyoufailintheexam，youwilllethimdown．如果你考试不及格，你会让他失望的。2.unlessconj.除非,若不,除非在……的时候（if...not...）Youwillfailtoarrivethereintimeunlessyoustartearlier.如果你不早点动身,你就不能及时赶到那儿。Unlessitrains,thegamewillbeplayed.除非下雨,比赛将照常进行。3.so/aslongasconj.只要Youmayborrowmybookaslongasyoukeepitclean.只要你保持书的清洁，你就可以把我的书借去。三．关于条件句的时态，常见的有以下三种情况：1、条件状语从句的主句是一般将来时，那么从句常常用一般现在时。WhenIgrowup,I’llbeanurseandlookafterpatients.我长大后要当一名护士，照顾病人。2、如果主句是祈使句，那么从句通常要用一般现在时。Ifyouwanttohaveachat,callmeup.如果你想聊天，打我电话。23、如果主句是含有情态动词时，根据需要从句多用一般现在时。Youshouldbequietwhenyouareinthereadingroom.在阅览室时应保持安静。四．知识拓展1在以when，before，assoonas等引导的时间状语从句，也适用“主将从现”原则，即如果主句是一般将来时，从句则用一般现在时。I'lltellherthegoodnewswhenshecomesback.当她回来的时候，我将把这个好消息告诉她。shewillgiveyouacallassoonasshereturns.她一回来就会给你电话。2.If条件句的同义句：祈使句，and/or+将来时态的陈述句。Workhard,andyouwillmakegreatprogress.=Ifyouworkhard,youwillmakegreatprogress.如果你努力学习，你才会取得大的进步。Hurryup,oryouwillbelate.=Ifyoudon’thurryup.Youwillbelate.如果你不快点，你就要迟到了。条件状语从句练习精讲（含答案）Ⅰ.单项选择1.Ifyou_____totheparty,you’llhaveagreattime.A.willgoB.wentC.goD.going2.Itwillbealongtime____Peter_____hiswork.A.since,hasfinishedB.after,finishesC.when,willfinishD.before,finishes.3.Whatwillfather_____usfromJapan?A.takeB.bringC.carryD.make4.Weifangisfamous______kitesA.forB.toC.onD.with5．I____hertheanswerifshe____me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asks36.–Whatareyougoingtodotomorrow?--We’llgotothelibrarytomorrowifit___.A.isn’trainB.rainC.won’trainD.doesn’train7.—Doyouknowwhenhewillcomebacktomorrow?--Sorry,Idon’tknow.Whenhe____back,I’lltellyou.A.comesB.willcomeC.comeD.maycome8.Whatwillyoudoifyou_____totheoldfolk’shomevisit?A.goB.wentC.goingD.willgo9.IfIeat____food,I’llbeveryfat.A.toomanyB.manytooC.toomuchD.muchtoo10.I’llgivethebooktohimifhe___herenextSunday.A.willcomeB.comesC.iscomingD.came11.There____anEnglishfilminourschooltomorrow.A.isgoingtohaveB.willhaveC.isgoingtobeD.has12.Couldyoutelluswhere____？A.willthenextOlympicGamesheldB.thenextOlympicGameswillbeheldC.wouldthenextOlympicGamesbeheldD.thenextOlympicGameswouldbeheld13.Whenmymotherreturnedlastnight,I____abook.A.readB.amreadingC.wasreadingD.amgoingtoread14.What____you____whenitbegantorain?A.do,doB.were,doingC.are,doingD.did,do15.I’llwakeyouupwhenhe____back.A.willB.isgoingtocomeC.comesD.comeAnswers：1---5CDBAD6---10DAACB11---15CBCBC二、用所给词的适当形式填空1.Ifyou________(feel)tired,you_________(have)tohavearest.42.Where_____he____(see)thefilmifhe_________(have)time?3.Ifthere____(be)fewertrees,there_______(be)morepollution.4.He___(dress)morecasuallyifhe___(notwork)onweekends.5.IfMarcia_______(live)alone,she_______(keep)apetparrot.6.Lana_____(buy)anewdressiftheoldone____(be)outofstyle.7.Thetwins_______(fight)ifthey__________(argue).8.I______(have)abakesaleifI____(need)moneyforeducation.9.Peter____(send)meabeautifulsouvenirifhe____(visit)Spain.10.IfMr.Green_______(say)Iamhard-working,myparents___(feel)glad.11.I______(go)tothebeachifit________(notrain)thisweek.12._____they___(have)amatchiftheP.E.teacher__(be)busy?13.He____(write)alettertohisgrandparentsifhe____(get)hisreportcardthisweek.14.Ifshe______(get)uplate,she_____(notcatch)theearlybus.15.Peter____(major)inEnglishifhe____(pass)theexamsinPekingUniversity.Answers：1feel，willhave2willseehas3are,willbe4willdresses,doesn’twork5lives,willkeep6willbuy,is7willfight,argue8willhave,need9willsend,visits10says,willfeel11willgo,doesn’train12Willhaveis13willwrites,gets14gets,won’t15willmajor,passesIII完成句子1.如果他到得晚了，会发生什么事情？What_______________ifhe_____________late?2.如果努力学习，你就会取得好成绩。Ifyou_________________,you________good________.3.他如果看电视太久了，他的父母会不高兴。Ifhe_____TVtoolong,hisparents______________unhappy.4.如果我们为他组织生日聚会，大家都会来的。Everyone________ifwe_______abirthdayparty________him.55.如果明天不下雨，我会和你一起去公园的。Ifit___________tomorrow,I_____gotothepark______you.6.如果她睡过头了，就会上学迟到的。She____________________________ifshe__________7.如果他没有空，他不会帮助你的。Ifhe________,he__________you.8.如果Tom考试不及格，他就没有机会上高中了。Tom______havethe_____togotothehighschoolifhe________theexams.9.如果这个男孩打烂窗户，屋主会对他生气。Iftheboy_____________________,thehouseowner___________________________________.10.如果明天不下雨，我就出去野餐。__________________________________________________Answers1.washappened，camelate?2workhard,willget，success.3.watch,willbe4willcome,hold,for5doesn’train,will,with6willbelateforschool,sleepslate7isn’tfree,won’thelp8won’tchancefails9breaksthewindow,willbeangryathim10.Ifitdoesn’traintomorrow,Iwillgoouttohaveapicnic.1.Ifyoufeeltired,youshouldhavetohavearest.2.Wherehasheseenthefilmifhehastime?3.Iftherearefewertrees,therewillbemorepollution.4.Hewilldressmorecasuallyifhedoesn‘tworkonweekends.5.IfMarcialivesalone,sheshouldkeep)apetparrot.6.Lanashouldbuyanewdressiftheoldoneisoutofstyle.7.Thetwinswillfightiftheyargue.8.IwillhaveabakesaleifIneedmoneyfo