八年级英语下册第五单元知识点整理

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1、八年级英语下册第五单元知识点整理一.重要词汇和句子1. 助动词do用于条件状语从句或答语中起省略作用,可使句子更简练.(1)-IthinkImgoingtotakethebustotheparty.-Ifyoudo,youllbelate.(2)-Doyoulikereadingharrypotter?-No,Idont.Butmysisterdoes.2. haveagoodgreatwonderfultime=havefun=enjoyoneself玩得很高兴过得很愉快Ihadagoodgreatwonderfultimeintheparkyesterday.=Ihadfuninthepa

2、rkyesterday.=Ienjoyedmyselfintheparkyesterday.3. letsb.sth.in让某人某物进来Whynotlethimin?Youdbetteropenthewindowsandletsomefreshairin.4.organize动词,“组织,安排,筹备”Theyaregoingtoorganizeapicnic.organization名词,“组织,机构”Sheworksforavoluntaryorganizationhelpinghomelesspeople.organizer名词,“组织者,建立者”Theorganizersofthecon

3、certsaidtheyhadagreatsuccess.5. takeaway拿走,取走take(anactive)partin(积极)参加takeoff起飞,脱下taketo把.带到taketurnstodosth轮流做某事takealook(at)看一看takeexercise做运动takenotes做笔记takearest休息takeonestemperature量体温takeiteasy别着急,别紧张takeover接管6. agoodtimetodosth做某事的好时间Marchisagoodtimetoplanttrees.Autumnisagoodtimetotravel.7.

4、 remindsb.ofsth.提醒某人做某事IfIforget,pleaseremindmetowritetomymother.8. aroundtheworld=allovertheworld在世界各地全世界Footballisverypopulararoundtheworldallovertheworld.Hisdreamistotravelaroundchina.9. makealiving=foraliving谋生Inthiscityhedrivesataxitomakealivingforaliving.Whatdoesyourfatherdotomakealivingforali

5、ving?makealiving(by)doingsth.以做某事谋生Theoldmanmakesaliving(by)hunting.10.提建议的句子Whynotdosth?为什么不做某事?Whydontyoudosth?为什么不做某事?Whatabouthowaboutdoing?做某事怎么样?Wouldyouliketodosth?你想愿意做某事吗?Shallwedosth?我们去做某事,好吗?Letsdosth,shallwe?让我们做某事,好吗?Doyouwanttodosth?你想去做某事吗?11.seemlikesth看起来像ItseemslikeyearssinceIlast

6、sawyou.自从我上次见到你以后,好象是过了好几年.Thosecardsseemedlikemanylittleflags.那些卡片看起来好象许多小旗子。Seemlikedoingsth.看起来像做某事Heseemedlikeforgettingwhathadhappened.12.chance名词,“机会,机遇”Wehavegetagoodchanceofwinningthematch.Thereislittlechanceofmeetinghimagain.bychance=byaccident偶然地Wemethimbychanceyesterday.takeachanceonsth.在

7、上冒险youshouldnttakeachanceonthat.13.allthetime总是,一直Theyaresingingthesamesongallthetime.Youcanhearthemtalkingandlaughingallthetime.Hestayedathomeallthetimelastnight其它短语:intime及时ontime准时attimes有时atthattime在那时atthesametime同时onceuponatime从前astimegoeson随着时间地推移takeonestime不着急watchonestime等待时机14.haveadiffic

8、ulttime(in)doingsth.难于做某事,做某事有困难=haveproblems(in)doingsth.=havetrouble(in)doingsth.Wehaveadifficulttimeworkingouttheproblem.Theyhavesomeproblemsgettingtothetopofthemountain.15.against介词,“反对,不同意,抵抗,对抗,对不利”反意词for,“赞成”Therewere20votes(票)forhimand12againsthim.Theysailedagainstthewind.他们顶风航行.Youneedtowea

9、racoatagainstthecold.你需要穿上外套防寒.Heisstandingagainstthewall.他靠墙站着.Hehitagainstatree.他撞到了树上.WearegoingtoplayabasketballmatchagainstClassTwoonSunday.16.forget忘记forgetsth忘记某物forgettodosth忘记去做某事forgetdoingsth.忘记做了某事leavesthsomewhere把某物忘在某处IforgottoturnoffthelightwhenIleft.Iforgottellinghimthemessageandtol

10、dhimagain.-Didyouforgetyourhomework?-Yes,Ileftitathome.17.inclass在课堂上,上课时intheclass在班上,在班里Wemustlistentotheteacherscarefullyinclass.Theycandosomeactivitiesinclass.Thereare45studentsintheclass.18.toomuch太多代替或修饰不可数名词,或修饰动词muchmany太多代替或修饰可数名词muchtoo太,非常后接形容词或副词Hesaystoomuchbutdoeslittle.thereistoomuchr

11、aininsummer.Ihavetoomanyrulesathome.Hehasdrunktoomuchanddrivesmuchtoofast.19.exercise(1)不可数名词,“锻炼,练习”Alotofexerciseisgoodforyourhealth.Youneedtodomoreexercisetokeephealth.(2)可数名词,“体操,运动”Wedomorningexercises(早操)everyday.Eyeexercises(眼保操)areimportanttostudents.(3)动词,“锻炼”howoftendoyouexercise?20. canbe

12、ableto(1)can没有人称的变化,但有现在时can和过去时could两种时态(2)beableto有人称的变化,也有现在时amisareableto,过去时waswereableto和一般将来时willbeableto的变化.21. make(alotof)money挣(许多)钱22. geta(good)education接受(良好)教育二.if引导的条件状语从句.(一)if引导的条件状语从句与主句时态的呼应.1.如果主句是一般将来时,从句要用一般现在时代替一般将来时.(1) 从句是肯定句，主语是第三人称单数时，行为动词后面要加ses.否则，动词用原形.(2) 从句是否定句，主语是第三

13、人称单数时，用doesnt+行为动词原形.否则，用dont+行为动词用原形.Wellhaveapicnicifitdoesntraintomorrow.Ifitrains，Iwillstayathome.Illgowithyouifyoudontwanttogoalone.Ifwehavethepartytoday，halftheclasswontcome.2. 如果主句含有must，may，can等情态动词，从句也用一般现在时.Ifyoudrivetoofast，youmayhaveanaccident.Youmuststopifthetrafficlightisred.3. 如果主句是祈使

14、句，从句也用一般现在时.Becarefulwithyourhomeworkifyoudontwanttomakemistakes.(二)if引导条件状语从句与if引导宾语从句时的区别.1. if引导宾语从句时，表示“是否，时不是”位于及物动词之后.if引导条件状语从句时，表示“假如，如果”，位于句首或句末Idontknowifhewillcometomorrow.ifhecomes，Illcallyou.2. 在if引导的宾语从句中，如果主句是一般现在时，宾语从句的时态根据需要确定；如果主句是一般过去时,宾语从句也要用过去的时态.而在if引导的条件状语从句中,要用一般现在时.Idontknow

15、ifitwillraintomorrow.HeaskedifIcouldhelphim.IcanhelpyouifIamfree(三)if引导的条件状语从句练习题选择题1.-IhearAnnawillgiveuplearningthepiano.-Ifshe,herparentswillbemadather.A.willB.doesC.doD.is2. -IhearJackChanwillcometoLaiwunextweek.-Really?hecomes,myyoungersisterwillbeveryhappy.A.ifB.untilC.unlessD.before3. IbetMrb

16、lackwillcometohelpusifhetoobusytomorrow.A.isB.willbeC.wontbeD.isnt选词填空1.What(willwould)happeniftheymissthebus?2. Ifwehavethemeetingtomorrow,he(do,will)notcome.3.Ifwewatchavideo,I(amwillbe)bored.4. Letsgohikingifit(doesntwont)rainonSunday.5. Canyoutellmeifit(willrainrains)tomorrow.仿照例句把两句合为一句.1. Yout

17、hinkyouregoingtovisitNewYorkcity.Youwillseesometallbuildings.-IfyouvisitNewYorkcity,youllseesometallbuildings.2. Youaregoingtoeatanddrinkmore.Youwillbefatter.3. Theyaregoingtodomoreexercise.Theirhealthwillbebetter.4. YouaregoingtoletmewatchTV.Iwillstayathome.5. Chineseteamaregoingtobechampions.Iwillbeveryexcited.