初中英語條件狀語從句

IfIgetuplate,Iwillbelateforschool.IfIdon’tfinishmyhomework,Iwon’tgotobed.由if引導(dǎo)的從句叫條件狀語從句，if意為“如果〞

假設(shè)主句是一般將來時，從句要用一般現(xiàn)在時。Ifyoujointheband,youwillbefamous.=Youwillbefamousifyoujointheband.Grammar條件狀語從句If

thetelephonerings,Iwill

answerit.If

yougetuplate,youwillbelateforschool.LookandsayIf

youfeelhungry,you

should

eatsomething.Ifyoufeeltired,you

must

havearest.If

youareill,you

must

gotoseeadoctor.If

youareridingabikeinthestreet,you

must

beverycareful.PairworkIfyoustayathome,youwillbesorry.Ifyouworkuntilnight,youwillbetired.Ifwebreakthetrafficrules,wewillgetafineandevenbeindanger.Ifitisfinetomorrow,wewillgoonaschooltrip.

wewillclimbmountains.IwillgotoBeijingUniversity.IfIstudyhard,IfIhaveenoughmoney,Iwilltravelaroundtheworld.Ifyouhavearobot,whatwillyoudo?playgamescleanmybedroomdohomeworkformeIwillletit…Example:

IfIhavearobot,Ifsentences(1)Ifsbdoessth,sbwilldosth=sbwilldosth

ifsbdoessth

主句〔將來時〕從句〔一般現(xiàn)在時〕A：actionshavingresultsthatwillprobablyhappen(2)主句為祈使句或情態(tài)動詞形式Ifsbdoessth,pleasedosthIfsbdoessth,sbmay(情態(tài)動詞)dosthIfsentences

Ifsbdoessth,sb/sthdoessth=sb/sthdosthifsbdoessth主句〔一般現(xiàn)在時〕從句〔一般現(xiàn)在時〕B：actionshavingresultsthatwillcertainlyhappen相當于when從句Can‘if’bereplacedbyotherwords?主語的行為將導(dǎo)致某種必然發(fā)生的結(jié)果時Exercises:changethefollowingsentencesintoifsentences3.Getupearly,notbelate4.Takeafishoutofwater,die5.Heatmetal,meltIfyougetupearly,youwon’tbelate.Ifyouheatmetal,itmeltsreturnscallbuypasses1.Ifshe______(return)fromParis,please____(call)me.2.Ifhe______(pass)thetest，wemay____(buy)acar.Ifyoutakeafishoutofwater,itdies.條件狀語叢句只有if…sentenses一種嗎？C：Unless：sbwilldosthunlesssbdoessth

ifsbdoesnotdosthEg:Youwillbelateforschoolyounow.Youwillbelateforschoolyounow.unlessleavedon’tleaveifUnlesssentencesexerciseshavetoothache,cleanyourteethregularlygetveryhot,puttheair-conditioneronsoonUnlessyoucleanyourteethregularly,youwillhavetoothacheIfyoudon’tcleanyourteethregularly,youwillhavetoothacheUnlessyouputtheair-conditioneronsoon,youwillgetveryhot.If

youdon’t

puttheair-conditioneronsoon,youwillgetveryhot.Morepractice1.Ifyou______(drop)aglass,it______(break).2.He______(fail)intheexamifhe______(notstudy)hard.3.Unlessyou______(leave)now,you______(be)late.4.We______(have)abarbecueunlessit______(rain).5.Ifyou____(cool)water,it_____(turn)intoice.6.Hurryup,oryouwillmissthebus.___youdon’thurryup,you____catchtheearlybus.7.Studyhard,oryou’llmissfallbehind.______youstudyhard,you______fallbehind.8.Ifyoudon’tputonyourscarf,you’llcatchcold.Putonyourscarf,_____you’llcatchcold.9.Theinsurancecompanywouldpayhim2millionyuanifthevasewasstolen.Theinsurancecompany_____payhim2millionyuan_____thevasewasstolen.10.Idon’tknowifit_______tomorrow.Ifit____,Iwon’tgoshopping.(rain)dropbreakswillfaildoesn’tstudyleavewillbewillhaverainscoolturnsIfwon’tUnlesswillorwon’tunlesswillrainrainsHaveatry用括號內(nèi)所給詞的正確形式填空1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.5.Ifshe____(be)kindtome,I__________(notargue)withher.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.7.Ifyou_____(pay)moreattentiontothat,he_________(notget)injured.goeswillhavestopshavewon’tgetdoiswon’targuecomescomeswillgivepaywon’tget8.MrLiwillbemadifwe_______(break)therules.9.Ifit_____(be)cloudy,they_______(notgo)therebyair.10.Pleaseletusknowifhe________(arrive)tomorrow.Pleaseletusknowifhe_________(arrive)tomorrow.

11.ShallIsay“Hello〞whentheforeigner______(come)intotheclassroom?12.He’llgetbettergradesifhe_________(study)hard.13.Ifyouworkreallyhard,you_______(be)famousa