人教版（2024）八年级上册英语Unit 8 语法（条件状语从句）精讲精练（含答案）

人教版(2024)八年级上册英语Unit8语法(条件状语从句)精讲精练【语法聚焦一】条件状语从句if引导的条件状语从句if意为“如果”,表示正面条件，引导条件状语从句，既可放在主句前面，也可放在主句后面。如果你去参加聚会，你将会玩得很开心。Mymotherwilltakemetotheparkifsheisfree我妈妈如果有空，就会带我去公园考点：if条件句的时态搭配1.if从句用一般现在时，主句用一般将来时(主将从现)Thecatwillscratchyouifyoupullhertail如果你拉猫的尾巴，它就会抓你。2.if从句用一般现在时，主句谓语含may/might/can(主情从现)Ifthefoggetsthicker,theplanemaybediverted.如果再大一些，飞机可能就会改在别的机场降落。Ifitstopssnowing,wecangoout.如果雪停了，我们就可以出去。3.if从句用一般现在时，主句是祈使句。(主祈从现)unless引导条件状语从句Iwon'tgotohispartyunlessheinvitesme.=Ifhedo如果他不邀请我，我将不会参加他的聚会。考点：当主句用一般将来时或是祈使句时，unless引导的从句常用一般现在时。(主将从现/主祈从现)Therewillbemorepollutionunlesspeopledriveless.如果人们不少开车，将会有更多污染。不要把水倒进河里，除非你们保证它足够干净。区分if引导的条件状语从句和if引导的宾语从句条件状语从句，可以放在主句之前并用逗号隔开，也可放在主句之后；而if引导的宾语从句只能放在主句之后。因此如果把if放在主句之前，句子通顺，意义不变，则是条件从句，否则是宾语从句。一、用所给词的适当形式填空2.Ifitisfine,we(go)forawalk.3.Ifitrainstomorrow,they(stay)athome.4.Youwillspoilitifyou(notbe)careful.5.Wewillbeverymuchpleasedifyou(come).6.Ifyou(feel)tired,you(have)tohavearest.7.Wherehe(see)thefilmifhe9.IfMarcia(live)alone,she(kee10.Lana(buy)anewdressiftheoldon11.IfMr.Green(say)Iamhard-working,myparents12.I(go)tothebeach14.He(writ15.Ifshe(get)uplate,sA.ifB.thatC.thoughD.whether()2.I'llgivethebooktohimiA.willcomeB.comes()3.Wewillhaveasportsmee第2页共9页第3页共9页A.won'tB.isn'tC.don'tD.doesn't()4.IfyoutothepartA.willgoB.wentC.go()5.—WhatareyougoingtodotoA.isn'trainB.rainC.won'train()6.—Thebookseemsalittleboring.A.whenB.ifC.afterD.unless()7.-Doyouknowifwewillgotothecinematomorrow?—Ithinkwe'llgoifwA.willhaveB.hadC.won'tA.won'trainB.is()9.—Idon'tknowifSam—Don'tworry.IwilltellyouifheA.willcome;comesB.comes;willcomeC.willcome;will()10.Iwanttoknowiftheresportsmeetingnextmonth.Iftheyit,ImustgA.is;willholdB.willbe;holdC.is:hold()12.—Jeff,couldyoutellmeifittomorrow.Ifittomorrow,IwillstayatA.rain;rainB.rains;rainsC.willrain;rainsA.got()14.—Do—Sorry,Idon'tknow.Whenheback,I()15.ThefootballmatchwillbeputoffifitA.willrainB.rainsC.rainedD.israinedA.rainB.israiningC.rainsD.willA.cantell,willaskB.willtellC.wouldtell,askD.willtell,asksA.didn'trainB.hasn'trained()20.Wehomeifthereisnobus.—Oh,whatapity!A.willwalkB.havewalkedC.walkedA.comeB.comesA.comesD.wouldcome)23.—Let'sgoclimbingifitthisSaturday.—Goodidea.Butnot A.isfine;rainsB.isfine;willrain1.如果努力学习，你就会取得好成绩。IfheTVtoomuch,hisparentsunhappy.4.如果他有空，他会帮助你的。Ifhe_,heyou.5.你如果抄同学的作业就不能学好各门功课。【语法聚焦一】条件状语从句if引导的条件状语从句if意为“如果”,表示正面条件，引导条件状语从句，既可放在主句前面，也可放在主句后面。如果你去参加聚会，你将会玩得很开心。Mymotherwilltakemetotheparkifsheisfree我妈妈如果有空，就会带我去公园if条件句的时态搭配1.if从句用一般现在时，主句用一般将来时(主将从现)Ifheruns,he'llgetthereintime.如果他用跑的，他就会及时赶到那儿。Thecatwillscratchyouifyoupullhertail如果你拉猫的尾巴，它就会抓你。2.if从句用一般现在时，主句谓语含may/might/can(主情从现)Ifthefoggetsthicker,theplanemaybediverted.如果再大一些，飞机可能就会改在别的机场降落。Ifitstopssnowing,wecangoout.如果雪停了，我们就可以出去。3.if从句用一般现在时，主句是祈使句。(主祈从现)Workhardifyouwanttogetgoodgrades.你如果想取得好成绩，就要努力学习。unless引导条件状语从句unless意为“除非；如果不”,引导条件状语从句，相当于if..not.….Iwon'tgotohispartyunlessheinvitesme.=Ifhedoesn'如果他不邀请我，我将不会参加他的聚会。当主句用一般将来时或是祈使句时，unless引导的从句常用一般现在时。(主将从现/主祈从现)Don'tpourthewaterintotheriverunlessyoumakes二、用所给词的适当形式填空18.Ifitrainstomo19.Youwillspoilitifyou20.Wewillbeverymuchpleasedifyoucome(come).21.Ifyoufeel(feel)tired,youwillhave(have)24.IfMarcialives(live)alone,shewill25.Lanawillbuy(buy)anewdressiftheold26.IfMr.Greensays(say)Iamhard-working,myparentswillfeel(fee27.Iwillgo(go)tothebeachifitdoesn'train(notrain)(A)1.WhynotaskyourteacherforhelA.ifB.thatC.thoughD.whether(B)2.I'llgivethebooktohimifheherenextSunday.A.willcomeB.comes(D)3.WewillhaveasportsmeetingifitraintomorA.won'tB.isn'tC.don't(C)4.Ifyoutotheparty,A.willgoB.wentC.(D)5.—Whatareyougoingtodotomorrow?—We'lA.isn'trainB.rainA.whenB.ifC.afterD.unless(D)7.-Doyouknowifwewillgotothecinematomorrow?—Ithinkwe'llgoifwetoomuchB.willhaveB.had(D)8.—WewillgoforapicnicifitthisSunday.—SouA.won'trainB.willcome;comesB.comB)10.IwanttoknowiftheresptB.is;willholdB.willbe;holdC.is;hold(D)11.ThesportsmeetwillcoA.ifB.untilC.assoonasC)12.—Jeff,couldyoutellmeifittomorrow.IfittA.rain;rainC.willrain;rainsD.(B)13.Ifyoustudyhard,youintA.gotB.willget(A)14.—Doyouknowwhenhewi—Sorry,Idon’tknow.Whenhe(B)15.ThefootballmatchwillbeputoffifitA.willrainB.rainsC.raAIfBThoughCButA.rainB.israining(D)18.Ihertheanswerifsheme.(D)19.Thestudentswillplant