if 引导的真实性条件状语从句

中考复习专题之

——if与unless引导的

真实性条件状语从句渡普中学徐爱玲精选ppt一.什么叫条件状语语从句？由连接词if或unless引导的状语从句叫做条件状语从句。条件状语从句用来说明主句动作发生的条件，即某一件事情〔从句中的动作〕实现之后，其他事情〔主句中的动作〕可能发生。其中if是“如果，假设〞的意思.unless是“除非，如果不〞的意思。

二.if引导的条件状语从句的位置：

if引导的条件状语从句，既可以放在主句之前，也可以放在主句之后。当从句置于主句之前时，常用都用逗号与主句隔开。Forexample:Youwillcatchthebusifyougetupearly.==Ifyougetupearly,youwillcatchthebus.精选ppt三.if引导的条件状语从句中主从句的时态：1.假设主句是一般将来时，if引导的从句用一般现在时。Forexample:

Ifitrainstomorrow,I’llstayathome.2.

如果主句是祈使句或含情态动词can,may,must，等时，从句也用一般现在时。Forexample:1).Youmustseethedoctorifyouareill.2)Don’twearwarmclothesifyouwanttogoskating.1.主句不能用begoingto表示将来时，只能用will!2.在if引导的条件状语从句中，不能使用some,而用any.遵守“主将从现〞的原那么。遵守“主现从现〞的原那么。精选pptForexample:Ifyouhaveanyquestionstoask,pleasecometomyoffice.Exercise: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.cantell,asks〔〕3.–Whatareyougoingtodotomorrow?--We’llgotothelibrarytomorrowifit___.A.isn’trainB.rainC.won’trainD.doesn’train〔〕4.Pleaseopenthewindowifyou_____veryhotintheclassroom.A.feelB.feltC.feelingD.willfeel精选ppt〔〕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.10.Lana________(buy)anewdressiftheoldone________(be)outofstyle.精选ppt四.unless引导的条件状语从句：“unless〞意思是“如果不;除非;〞相当于''if...not''.unless引导的条件状语从句主从句时态与if的一样！Forexample:We’llgoforapicnicifitdoesn’trainthisSunday.===We’llgoforapicnicunlessitrainsthisSunday.Exercise:1.除非明天下雨，否那么我将和你一起去公园的。Unlessit_____tomorrow,I________totheparkwithyou.2.除非我们早点离开，否那么不能准时到。wecan’tgetthereontimeunlesswe_________earlier.3.除非你更加小心点，否那么你就会出事故。Unlessyou_______morecare,you_______anaccident.精选ppt五.条件状语从句和主句还有一个共同的伙伴，有时它可以代替从句和主句，它就是‘‘祈使句+and/or+简单句〞。其中and表示句意顺承；or那么表示转折，意思为“否那么〞。Forexample:1.Ifyouworkharder,you’llpasstheexam.==Workharderandyou’llpasstheexam.2.Ifyoudon’thurryup,you’llmissthetrain.==Hurryup,oryou’llmissthetrain.同义句转换:

1.Studyhard,oryouwon’tpasstheexam.Ifyoustudyhard,you__________theexam.2.Takeataxi,andyou’llcatchthetrain._____you_____ataxi,you’llcatchthetrain.

精选ppt3.Ifyougotobedearly,youwon’tfeeltiredinthemorning._______________early,_____youwon’tfeeltiredinthemorning.

4.Ifyoudon’tworkhard,yourteacherwillprobablybeangry.___________,_____yourteacherwillprobablybeangry.5.Breathedeeplyforoneminute,andyou’llfeelrelaxed._____you______deeplyforoneminute,you__________relaxe.精选ppt一.概念：二.从句的位置：1〕主句在前，从句在后，句末一个标点符号。2〕从句在前，主句在后，中间用逗号隔开。三.主从句的时态：1〕主将从现。2〕主现从现。〔条件：从句有情态动词或是祈使句〕四.unless引导的条件状语从句：〔====if...not....除非/如果...不....)五.与“祈使句+and/or+简单句〞之间的转换：精选ppt

if条件状语从句的时态练习_初中习题集

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,asks

精选ppt6.–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.came精选ppt11.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.come精选ppt

II、用所给词的适当形式填空1.Ifyou_______(feel)tired,you______(have)tohavearest.2.Wh