-unit 7 memory 语法 if条件状语从句牛津深圳版英语八年级上册

八上Unit7Memory语法(If条件状语从句)【学习目标】1.掌握unit7语法if引导的条件状语从句的概念，构成及应用【课前小测】一、单项选择。1.Ourbusinesswon’timprove____weofferbetterservicetoourcustomers.A.becauseB.unlessC.afterD.since2.—Let’sgoclimbingifit_________thisSaturday.—Goodidea.Butnobodyknowsifit_____.A.isfine;rainsB.isfine;willrainC.willbefine;rainsD.willbefine;willrain3.Ifyoutakethefishoutthewater,it________.A.diesB.willdieC.diedD.isdying4.Ifyou_____tojoinaneducationalexchange,youmustapplyforitfirst.A.wantB.wantedC.wantsD.wanting5.Inhotweather,foodgoesbadeasily______itiskeptinthefridge.A.becauseB.ifC.unlessD.since6.—MayIplaythecomputergame?—No,_____youpromisetofinishyourhomeworkfirst.A.unlessB.ifC.butD.so7.They____theGreatWallunlessit_______.A.willvisit;willrainB.willvisit;rainsC.visit;willrainD.visit;rains8.IfIfindyourdog,I_____youacall.A.giveB.gaveC.givingD.willgive9.I________hertheanswerifshe________now.A.cantell;willaskB.willtell;willaskC.wouldtell;asksD.willtell;asks10.You_________atoothacheunlessyou_________yourteetheveryday.A.willget;brushB.willget;willbrushC.get;willbrushD.get;brush二、用括号内所给词的适当形式填空。1.Ifhe_________(come)tonight,hewillmeetyouattheparty.2.Iftheweather_________(get)worse,wewillhavetostayinside.3.Iftherain__________(stop)soon,willyougotothecinemawithme?4.I________(buy)anewmobilephoneifI________(have)enoughmoney.5.Ifyou________(drop)aglass,it____________(break).答案：一.1-5BBBAC6-10ABDDA二.1.comes2.Gets3.willstop4.willbuyhave5.dropswillbreak【要点梳理】一、由if引导的条件状语从句1.主现从现--谈论客观真理、客观事实和普遍现象时，表示条件的从句用一般现在时，用if引导;表示结果的主句用一般现在时，这种句型简称为主现从现句型。特别注意：从句主语是三单时，谓语动词要加s或es例如：Ifspringcomes,treesturngreen.Ifyouheatmetal,itmelts.2.主将从现--谈论将来可能出现的情况时，表示条件的从句用一般现在时，用if引导;表示结果的主句用一般将来时，这种句型简称为主将从现句型。例如：IfIamfreetomorrowafternoon（从句）,Iwillgoshopping（主句）.Ifyoudon’thurryup，youwillbelateforwork.3.主情从现--谈论将来可能出现的情况时，主句也可用情态动词，从句用一般现在时。例如：Ifitstopssnowing,wecangoout.Ifyouwanttoloseweight,youmust/shouldeatlessbread.4.主祈从现--谈论将来可能出现的情况时，主句也可用祈使句，表示提醒告诫，从句用一般现在时。例如：Ifyouwanttogo,pleasetellme.Ifyoulikethephoto,putitonthewall.提示：1.if从句可以放在句首，也可以放在句末。如果把if从句放在句首，常用逗号将其与主句隔开。例如：Ifyoustudyhard,youwillimproveyourEnglish.YouwillimproveyourEnglishifyoustudyhard.2.有时，if引导的条件状语从句可以进行转换，肯定句转换为：祈使句，and+简单句(将来时)，Ifyoustudyhard,youwillgetgoodgrades.=Studyhard,andyouwillgetgoodgrades.否定句转换为：祈使句，or+简单句(将来时)。or表示“否则”Ifyoudon’thurryup,youwillbelate.=Hurryup,oryouwillbelate.二、unless意为“除非”，和if…not(如果……不……)的意思相近，可以互换使用。在unless引导的从句中，通常用一般现在时，主句用一般将来时，即“主将从现”。例如：Wewillhaveapicnictomorrowifitdoesnotrain.=Wewillhaveapicnictomorrowunlessitrains.三、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。Aslongasyouhaveabalanceddiet,youcankeephealthy.只要你平衡饮食，你就能保持健康四、once引导的条件状语从句once引导的条件状语从句，意为“一旦...，就”，从句可置于主句前或后Onceyoubegin,neverstop.一旦开始，就绝不要停止。Mathsiseasytolearnonceyouunderstandtherules.一旦你理解了规则，数学就不难学了。补充：1.连接词：if;unless;incase,aslongas;solongas;onconditionthat(=aslongas);suppose/supposing(=if);provided(=if);butfor要不是without如果没有incaseofsth.万一；以防2.例句1.I'lltellyouthetruthonconditionthatyoupromisetokeepitasecret.2.Butforyourhelp,weshouldn'thavefinisheditintime.3.Supposingitrains,shallwecontinuethesportsmeeting?4.IncaseIforget,Iprepareanotetoremindmeofthethings.5.Wewillsignthecontractprovidedtheprizetheyofferisright.【总结】【课堂练习】一.根据所给的汉语内容，用英语完成下列句子。每空一词，缩写算一词。1.如果你长时间不浇花，它们就会死。Flowers___________ifyou______________________themforalongtime.2.如果明天下雨，我就呆在家里。Ifit___________tomorrow,I______________________athome.3如果这只狗吃太多的肉，它会很饱。Ifthedogeatstoomuchmeat,it______________________.4.Ben，如果你早早完成作业，你就可以回家了。Ben,youcangohomeifyou___________yourhomework___________.5.如果我妈妈参观中国的话，她将会给我买一件礼物。Mymother______________________meagiftifshe___________China.二．用括号中所给单词的正确形式填空。1.Jane_________(feel)betterifshetakesmedicine.2.Callmeifthetrain_____________(notarrive)at3:30pm.3.Mandy________(lose)thetennisgameunlessshe_________(practise)alot.4.Youcan_________(visit)ourwebsiteifyouwanttoknowmoreinformationaboutit.5.Ifwetryourbest,ourdreams_________(come)trueoneday.6MrWang_________(do)sportseverymorningunlessbadweather_________(stop)him.7.Ifyoutakeataxi,you_________(get)therebefore9o’clock.8.Shewillnotrememberthefactsunlessshe___________(understand)themwell.9.Youshouldasksomeoneforhelpifyou_________(be)introuble.10Linda__________(notgo)toJohn’spartyunlesshe_________(invite)her.三.单项选择()1.Studyingingroupsisnecessary___________youwanttodowellinschoo1.A.if()2.Kevinwillgivelesshomeworktohisstudentsifhe___________ateacher.A.becomesB.becomeC.becameD.becomingB.untilC.unlessD.though()3.Ifourgovernment_____payattentiontothesafetyoffood,ourhealth_____indanger.A.isn't;isB.doesn't;willbeC.won't;isD.isn't;willbe()4.—Yourauntoftenwalksthedoginthemorning.—Yeah,___________badweatherstopsher.A.whenB.unlessC.becauseD.since()5.Ifapolarbear___________,it___________fishfromthewater.A.willbehungry;catchesB.ishungry;willcatchD.ishungry;won'tcatchC.isgoingtobehungry;catches()6.—Canstudentsgoonlineduringlessons?—Theycan____itisforthatlesson.A.ifB.orC.soD.but()7.—IthinkKarenshouldgoswimmingwithKate.—Ifshe____,shewillhavegreatfun.A.doesB.doC.willdo()8.Whenyouareinyourschooldininghallduringlunchtime,youmayfeellonely____youcanfindsomeonetohavelunchwith.A.ifB.unlessC.afterD.because()9.—DoyouthinkifRobertwillgotothezootomorrow?—Ithinkhewillgoifhe____toomuchhomework.A.don’thaveB.won’thaveC.doesn’thave()10.Youmustn’tdriveacarontheroad____yougetadriver’slicense.A.unlessB.ifC.since答案一.1.die;don’twater2.rains;willstay3.isfull4.finish;early5.willbuy;visits二．1.willfeel2.doesn’tarrive3.willlose;practises4.visit5.willcome6.does;stops7.willget8.understands9.are10.won’tgo;invites三.1-5AABBB6-10AABCA课后作业】一、语法填空。Doyouhavesuchexperiences?Whenyouareintroducingsomeonetothelisteners,suddenlyyoucan'tcomeup1._______hisname.Youcan'trememberwhereyou'veputyourvaluablethings.Mostpeoplehave.Butmostofthemhaven't2._______（realize）thattheyhaveamemoryproblem.Ifyoubelievememorycanbeimproved,the3._______（follow）willshowyouhow.First,relax.Ifyoukeep4._______（tell）yourselfthatyourmemoryisbad,yourmindwillcometobelieveitandyouwon'trememberthings.Butrelaxing5._______（be）notenough.Toimproveyourmemory,you'llneedtotake6._______activerole.Likeyourbody,youcanmakeyourmemorystrong.Lookfor7.______（chance）toexerciseyourmemory.Ifyoudon'ttakenoticeofthings8._______（active）,youwon'trememberthem.So,youcanmakepicturesofwhatyouseeinyourmindeveryday.Forexample,don'tjustputyourkeysdown!Ifyouwanttofind9._________（they）again,makeamindpictureoftheplace10._______youhaveputthem.二．完型填空Somechildrenwishtobewriterswhentheygrowup.That1thattheywanttowritestoriesorbooks.Theywouldbehappyifmanypeoplereadtheirstoriesorbookssomeday,butIwouldlike2thesechildrenthattheywillneedtobegoodreadersandreadalotbeforetheybecomegoodwriters.Nearlyallgreatwritersoftenlistened3otherstellstorieslongbeforetheystartedschool.Theyalso4onreadingforhoursandhoursforyears.Evenwhentheyhadbecomewriters,theyspentmuchoftheirtime5booksinsteadofwatchingTVintheevening.Ifyouareagoodreader,it