初中英语语法——if引导的条件状语从句(讲解及练习) 3页

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。 练习Ⅰ.单项选择（）1.Ifyou_____totheparty,you’llhaveagreattime.A.willgo B.went C.go  D.going（）2.I____hertheanswerifshe____me.A.cantell,willask  B.willtell,willask C.wouldtell,ask  D.willtell,asks（）3.–Whatareyougoingtodotomorrow? --We’llgotothelibrarytomorrowifit___.A.isn’train B.rain  C.won’train D.doesn’train（）4.Whatwillyoudoifyou_____totheoldfolk’shome?A.go  B.went  C.going  D.willgo（）5．I’llgivethebooktohimifhe___herenextSunday.A.willcome  B.comes  C.iscoming   D.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.