初中英语语法――If引导的条件状语从句(讲解及练习)

初中英语――条件状语从句（讲解&练习）Ⅰ条件状语从句的定义Ⅱ条件状语从句的引导词1.if引导的条件状语从句表示在某种条件下某事很可能发生。Ifwepaymuchattentiontotheearth,we'llhaveabetterworld.如果我们多关爱地球，就会拥有一个更美好的世界Ifitrainstomorrow,whatshallwedo?如果明天下雨，我们怎么办？注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。Whatwouldhappeniftherewerenowater?如果没有水会怎样？2.unless引导的条件状语从句unless的意思是如果不，除非。可与if...not互换。YouwillfailinEnglishunlessyouworkhard.你英语考试会不及格的，除非你更加努力。3.as/solongas引导的条件状语从句as/solongas意思是“只要”Solongasyou'rehappy,iwillbehappy.只要你高兴，我就高兴。Ⅲ条件状语从句的种类Ⅳ条件状语从句的时态原则注意：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。条件句表真实，主将从现要遵从；条件句非真实，虚拟语气用到位。条件句从句主句真实一般现在时一般将来时情态动词+动原祈使句非真实一般过去时be动词用（were）would/could+动原练习Ⅰ.单项选择（）1.Ifyou_____totheparty,you’llhaveagreattime.A.willgoB.wentC.goD.going（）2.I____hertheanswerifshe____me.A.cantell,willaskB.willtell,willaskC.wouldtell,askD.willtell,asks（）3.–Whatareyougoingtodotomorrow?--We’llgotothelibrarytomorrowifit___.A.isn’trainB.rainC.won’trainD.doesn’train（）4.Whatwillyoudoifyou_____totheoldfolk’shome?A.goB.wentC.goingD.willgo（）5．I’llgivethebooktohimifhe___herenextSunday.A.willcomeB.comesC.iscomingD.cameⅡ.用所给词的适当形式填空6..Ifyou________(feel)tired,you_______________(have)tohavearest.7.Where_______he_________(see)thefilmifhe________________(have)time?8.Ifthere__________(be)fewertrees,there_______________(be)morepollution.9.IfMarcia_____________(live)alone,she___________________(keep)apetparrot.11.Lana________________(buy)anewdressiftheoldone____________(be)outofstyle.12.Thetwins______________(fight)ifthey_______________(argue).13.I____________(have)abakesaleifI_____________(need)moneyforeducation.14.Peter_____________(send)meabeautifulsouvenirifhe________________(tour)Spain.15.I____________(go)tothebeachifit________________(notrain)thisweek.17.__________they__________(have)amatchiftheP.E.teacher_____________(be)busy?18.Ifshe____________(get)uplate,she_____________(notcatch)theearlybus.Ⅲ.翻译下列句子19..如果他到的晚了会发生什么事情？What_______________ifhe_____________late?20.如果努力学习，你就会取得好成绩。Ifyou___________________,yougoodmarks.21.他如果看电视太久了，他的父母会不高兴。Ifhe_________TVtoomuch,hisparents____________________unhappy.22.如果我们为他组织生日聚会，大家都会来的。Everyone________________ifwe_____________abirthdayparty__________him.23.如果明天不下雨，我会和你一起去公园的。Ifit____________________tomorrow,I______________gotothepark_________you.24.如果她睡过头了，就会旅游迟到的。She;__________________________thetripifshe___________________.25.如果他有空，他会帮助你的。Ifhe_________________,he_________________you.26.如果Tom考试不及格，他就没有机会上高中了。Tom_________havethe________togotothe________highschoolifhe________theexams.