13Unit1（原卷版）-2021-2022学年八年级英语下册链接教材精准变式练（牛津译林版）

重点语法Unit1（原卷版）20212022学年八年级英语下册链接教材精准变式练（牛津译林版）教材重点语法教材重点语法知识链接及典例解读现在完成时的用法教材原句AmazingchangeshavetakenplaceinSunshineTown.阳光镇发生了巨大的变化。语法精讲一、现在完成时的含义1.表示过去已完成的动作对现在产生的影响，常与“already”、“yet”、“just”等连用；e.g.Hehasalreadyhadbreakfast.(现在饱了)2.也可表示过去发生的动作持续到现在，常与“since”自从、“for”等连用。e.g.IhavelivedheresinceIwasborn.3.表示一个过去的动作直到现在发生的次数。e.g.Ihavealreadyreadthisbookthreetimes.二、现在完成时的构成1)现在完成时的肯定句句型主语（第一、二人称单/复数）+have+过去分词主语（第三人称复数）+have+过去分词

主语（第三人称单数）+has+过去分词have(has)为助动词e.g.Hehasalreadyhadhislunch.e.g.Ihavejustfinishedmyhomework.2)现在完成时的否定句句型主语+have/hasnot(haven't/hasn't)+过去分词e.g.Ihavenotseenthemovieyet.e.g.Shehasn’teatenit.3)现在完成时的一般疑问句Have/Has+主语+过去分词+…？e.g.Haveyoufinishedthework?e.g.Hasshearrivedhere?e.g.Havetheyeatensupper?三、过去分词的构成A.规则动词的过去分词（参照动词的过去式变化规则）B.不规则动词的过去分词四、现在完成时的标志时间副词和时间短语:1)副词already和yet。already一般用于肯定句中，yet一般用于否定句和疑问句中。e.g.Wehavealreadyfinishedourhomework.2)副词ever和never。多用于否定或疑问句中，表示“曾经”或“从未“等。

e.g.HaveyoueverbeentotheGreatWall?你曾经去过长城吗?3)用just表示到说话时为止的时间状语,e.g.Ihavejustseenher,butIdon’tknowwheresheisnow.注意：当在肯定陈述句中含有already或just时，在转换成否定句或疑问句时，要把句中的already或just去掉，在句末加上yet.e.g.Ihavedonemyhomeworkalready.Ihaven’tdonemyhomeworkyet.典例解读1.Hehasnever_______apenbefore.A.loseB.toloseC.lostD.losing答案C解析本题主要考查现在完成时态对谓语动词的要求。现在完成时态谓语动词的结构是have(has)+过去分词。本题空白处需要过去分词，这样A、B、D都不对。2.Ihaveneverseenthefilm______.A.agoB.justnowC.beforeD.later答案C解析动词时态为现在完成时，与之搭配的词必须是Ever,never,already,yet,before,recently等词。而ago,justnow等只能用于一般过去时句子中，用later意思不通3.Greatchanges______inDaqingsincethe1990s.Atookplace B.weretakenplaceC.havetakenplace D.havebeentakenplace【答案】C【解析】考查动词的时态和语态。“since+一段时间”常与现在完成时连用，且表示“发生”的动词短语takeplace无被动语态。故选C。4.MissBrown,we______cleaningourclassroom.Canwegohomenow?A.finishB.finishingC.arefinishedD.havefinished【答案】D【解析】句意：布朗夫人，我们已经打扫完了教室，我们现在可以回家了吗？finish完成；finishing现在分词形式；arefinished被完成，被动语态形式；havefinished现在完成时，已经完成。根据句意可知，我们已经打扫完了，强调动作已经完成。故应选D。一、单选题1．—Look!Howcleantheclassroomis!—Yes.I'msuresomeone__________itup.A．cleans B．iscleaning C．willclean D．hascleaned2．Greatchanges__________inmyhometownsinceliberation.A．havebeentakenplace B．tookplaceC．havetakenplace D．weretakenplace3．—Whywon'tyougotoseethedolphinshowwithme?—BecauseIit.A．saw B．willsee C．see D．haveseen4．WiththehelpofourEnglishteacher,Tony___________alot.He'sgoodatEnglishnow.A．changed B．haschanged C．ischanging D．changes5．—_______you_______yourhomework?—Yes,Ihave.I_______itonlyanhourago.A．Did;finish;did B．Have;finished;didC．Are;finishing;did D．Have;finished;havedone6．Thepaperfactoryhascausedalotofseriousairpollutioninmyhometown___________.A．lastyear B．onceamonthC．infiveyears D．overthepastfiveyears7．Iamsurprisedatthenewlookofmyhometown,forit________alotovertheyears.A．changed B．changes C．willchange D．haschanged8．Nicetoseeyouagain.I________youforalongtime.A．hadn'tseen B．haven'tseen C．didn'tsee D．don'tsee9．Thecountrylife______greatlysince1992.A．change B．haschanged C．changing D．havechanged10．StudentsinBeijing____________awaymanybookstotheHopeSchoolssince2009．A．havegiven B．give C．gave D．giving11．—______you______himaroundthemuseumyet?—Yes.Wehadagreattimethere.A．Have;shown B．Do;show C．Had;shown D．Did;show12．Danny______hardforlongtorealizehisdreamandnowheispopular.A．works B．isworking C．hasworked D．worked13．We______ournewneighborsyet,sowedon'tknowtheirnames.A．don'tmeet B．won'tmeet C．haven'tmet D．hadn'tmet14．—______mydictionary?—Yes.Isawitonyourdeskamomentago.A．Haveyouseen B．DoyouseenC．Hadyouseen D．Wouldyouseen15．—HaveyougotanemailfromMillie?—______.Nonewsisgoodnews.A．Yes,Ihave B．Nevermind C．Noproblem D．No,Ihaven't16．Theoldcity_______alotsincetenyearsago.A．changed B．changes C．change D．haschanged17．Tom,willyougotoseethefilmLostInThailandthisevening?No,Iwon't.I_______italready.A．saw B．willsee C．see D．haveseen18．He_______hishomeworkalreadyandnowheiswatchingTV.A．hasfinished B．finishes C．willfinish D．finished19．Ican'tgetintomyroomnowbecauseI_______mykey.A．lose B．willlose C．havelost D．amlosing二、语法填空20．Wecannevercatchupwiththefashionbecauseit(change)allthetime.21．—you(hear)fromyourparentsrecently?—Yes,I(receive)oneyesterday.22．—CanyoutellmesomethingaboutthefilmTitanic?—Sorry.I(know)nothingaboutitbecauseI(notsee)ityet.23．Look!Therain(stop).Let'sgoonworking.24．Fiveyears(pass)sincehelefthome.25．Things(change)alotovertheyears.三、句型转换26．Theyhavealreadyfinishedreadingtheicbooks.(改为否定句)Theyfinishedreadingtheicbooks.27．WebegantolearnEnglishthreeyearsago.(改为同义句)WeEnglishsincethreeyearsago.28．Nowthegovernmenthasturnedpartofthetowncentreintoanewpark.（改为否定句）Nowthegovernment