初中条件状语从句(附答案)

条件状语从句讲解及练习一、考点归纳由连接词if或unless引导的状语从句叫做条件状语从句。（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在是“主将从现原则”。通常译作“假如，如果，除非”。引导词：常用引导词：if,unless1.if引导词用法学习if引导的条件状语从句的用法,现在总结一下:if条件句不一般,几个要点记心间;条件句,放在前,逗号要放句中间。条件句表可能，主句多用将来时；条件句表事实，主句常用现在时。if引导的条件句有：真实条件句和非真实条件句两种:（1）真实条件句：表示在某种条件下某事很可能发生。Eg:a)Ifyouaskhim,hewillhelpyou.如果你请他帮忙,他会帮你的。b)Ifyoufailintheexam,youwilllethimdown.如果你考试不及格,你会让他失望的。c)Ifitrainstomorrow,wewon’tgoonapicnic.如果明天下雨，我们就不去野餐。注意：切记紧跟着if的那句话是从句。（2）非真实条件句是虚拟语气的一种，表示与事实相反，不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。Eg:a)IfIwereyou,Iwouldinvitehimtotheparty.如果我是你,我会邀请他参加聚会。b)IwouldhavearrivedmuchearlierifIhadnotbeencaughtinthetraffic.如果没有堵车,我会到的早一点儿。c)IfIwereyou,Iwouldgowithhim.如果我是你,我会和他一起去的。2.unless引导词用法（1）固定搭配：unless=if...not除非,若不,除非在„„的时候。Eg:a)Youwillfailtoarrivethereintimeunlessyoustartearlier.=Ifyoudon’tstartearlier,youwillfailtoarrivethereintime.如果你不早点动身,你就不能及时赶到那儿。b)Unlessitrains,thegamewillbeplayed.=Ifitdosen'train，thegamewillbeplayed.除非下雨,比赛将照常进行。c)Let'sgooutforawalkunlessyouaretootired.d)=Ifyouarenottootired,let'sgooutforawalk经典语句：Ifitdosen'traintomorrow,wewillgotothezoo.条件状语从句就是用以表示“在某种条件下,会…”二、课堂练习I用所给词的适当形式填空1.Ifyou________(feel)tired,you_______________(have)tohavearest.2.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________________(tour)Spain.10.IfMrGreen___________(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.15.如果他到的晚了会发生什么事情？What_______________ifhe_____________late?16.如果努力学习，你就会取得好成绩。Ifyou___________________,you___________good_____________.17.他如果看电视太久了，他的父母会不高兴。Ifhe_________TVtoomuch,hisparents____________________unhappy.18.如果我们为他组织生日聚会，大家都会来的。Everyone________________ifwe_____________abirthdayparty__________him.19.如果明天不下雨，我会和你一起去公园的。Ifit____________________tomorrow,I______________gotothepark_________you.20.如果她睡过头了，就会旅游迟到的。She;__________________________thetripifshe___________________.21.如果他有空，他会帮助你的。Ifhe_________________,he_________________you.22.如果Tom考试不及格，他就没有机会上高中了。Tom_________havethe________togotothe________highschoolifhe________theexams.23.你如果抄同学的作业就不能学好各门功课。You____________goodatallthesubjectsifyou______theotherstudents’homework.II.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______kites.A.forB.toC.onD.with5．I____hertheanswerifshe____me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asks6.–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.come1---5CDBAD6---10DAACB11---15CBCBC