八年级英语下册第五单元知识点整理

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)---IthinkI’mgoingtotakethebustotheparty.---Ifyoudo,you’llbelate.(2)---Doyoulikereadingharrypotter?---No,Idon’t.Butmysisterdoes.2.haveagood\great\wonderfultime==havefun==enjoyoneself玩得很高兴\过得很愉快Ihadagood\great\wonderfultimeintheparkyesterday.==Ihadfunintheparkyesterday.==Ienjoyedmyselfintheparkyesterday.3.letsb.\sth.in让某人\某物进来Whynotlethimin?You’dbetteropenthewindowsandletsomefreshairin.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”Theorganizersoftheconcertsaidtheyhadagreatsuccess.5.takeaway拿走,取走take(anactive)partin(积极)参加takeoff起飞,脱下take…to…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takeone’stemperature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.remindsb.ofsth.提醒某人做某事IfIforget,pleaseremindmetowritetomymother.8.aroundtheworld==allovertheworld在世界各地\全世界Footballisverypopulararoundtheworld\allovertheworld.Hisdreamistotravelaroundchina.9.makealiving===foraliving谋生Inthiscityhedrivesataxitomakealiving\foraliving.Whatdoesyourfatherdotomakealiving\foraliving?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?Whydon’tyoudosth?为什么不做某事?Whatabout\howaboutdoing?做某事怎么样?Wouldyouliketodosth?你想\愿意做某事吗?Shallwedosth?我们去做某事,好吗?Let’sdosth,shallwe?让我们做某事,好吗?Doyouwanttodosth?你想去做某事吗?11.seemlikesth看起来像……ItseemslikeyearssinceIlastsawyou.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”Wehave\getagoodchanceofwinningthematch.Thereislittlechanceofmeetinghimagain.bychance=byaccident偶然地Wemethimbychanceyesterday.takeachanceonsth.在……上冒险youshouldn’ttakeachanceonthat.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takeone’stime不着急watchone’stime等待时机14.haveadifficulttime(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.Youneedtowearacoatagainstthecold.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.Iforgottellinghimthemessageandtoldhimagain.---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.thereistoomuchraininsummer.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.can\beableto(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am\is\areableto,过去时was\wereableto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s\es.否则,动词用原形.(2)从句是否定句,主语是第三人称单数时,用doesn’t+行为动词原形.否则,用don’t+行为动词用原形.We’llhaveapicnicifitdoesn’traintomorrow.Ifitrains,Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone.Ifwehavethepartytoday,halftheclasswon’tcome.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.如果主句是祈使句,从句也用一般现在时.Becarefulwithyourhomeworkifyoudon’twanttomakemistakes.(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Idon’tknowifhewillcometomorrow.ifhecomes,I’llcallyou.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.Idon’tknowifitwillraintomorrow.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.IbetMrblackwillcometohelpusifhe_______toobusytomorrow.A.isB.willbeC.won’tbeD.isn’t选词填空1.What________(will\would)happeniftheymissthebus?2.Ifwehavethemeetingtomorrow,he_____(do,will)notcome.3.Ifwewatchavideo,I__________(am\willbe)bored.4.Let’sgohikingifit________(doesn’t\won’t)rainonSunday.5.Canyoutellmeifit_________(willrain\rains)tomorrow.仿照例句把两句合为一句.1.Youthinkyou’regoingtovisitNewYorkcity.Youwillseesometallbuildings.---Ifyouvisi