人教版九年级英语Unit7知识点精讲及练习题

人教版九年级英语Unit7知识点精讲及练习题同学们，当我们步入九年级，英语学习的深度和广度都有了新的要求。Unit7围绕“青少年应该被允许做什么？”这一核心话题展开，不仅涉及大量实用词汇和短语，更重要的是对情态动词的被动语态进行了重点讲解。这不仅是考试的重点，也是我们日常交流中表达观点、探讨规则的重要工具。下面，我们就一同深入学习本单元的核心知识，并通过练习加以巩固。一、核心词汇与短语精讲词汇是语言的基石，掌握本单元的重点词汇和短语，能帮助我们更精准地理解和表达。1.allow(v.)允许，准许*用法：allowsb.todosth.允许某人做某事；allowdoingsth.允许做某事*例句：Myparentsdon'tallowmetostayoutlate.(我父母不允许我在外面待到很晚。)Wedon'tallowsmokingintheclassroom.(我们不允许在教室里吸烟。)2.wrong(adj.)错误的，不对的；(n.)错误*反义词：right(adj.)正确的*例句：It'swrongtocheatinexams.(考试作弊是不对的。)Youmustlearnfromyourmistakes.(你必须从错误中学习。)3.deal(v.)处理，应对；(n.)交易，协议*常用短语：dealwith处理，对付；abigdeal重要的事*例句：Heisgoodatdealingwithdifficultsituations.(他善于应对困难局面。)Don'tworry,it'snotabigdeal.(别担心，没什么大不了的。)4.choice(n.)选择*动词形式：choose(chose,chosen)*常用短语：makeachoice做出选择；havenochoicebuttodosth.别无选择只能做某事*例句：Youhavethechoicetostudyortoplay.(你可以选择学习或者玩耍。)*反义词：succeed(v.)成功；pass(v.)通过6.getinthewayof...妨碍，挡道7.beseriousabout...认真对待...，对...是认真的8.spend...onsth./(in)doingsth.在...上花费（时间/金钱）*例句：Shespendsalotoftimeonherhomework.(她花很多时间做家庭作业。)Hespendstwohours(in)readingeveryday.(他每天花两小时阅读。)二、重点句型解析本单元的句型围绕“允许”、“应该”、“需要”等情态意义展开，特别是被动语态的运用。1.Sb.allow(s)sb.todosth.某人允许某人做某事。*例句：MymotherallowsmetowatchTVforanhoureveryday.*否定式：Sb.doesn't/don'tallowsb.todosth.*例句：Myteacherdoesn'tallowustoeatinclass.2.Sb.be(not)allowedtodosth.某人（不）被允许做某事。（被动语态）*这是本单元的核心句型，表示某人获得或未获得做某事的许可。*例句：Teenagersshouldbeallowedtochoosetheirownclothes.(青少年应该被允许选择他们自己的衣服。)Youarenotallowedtoparkhere.(这里不允许停车。)*【拓展】将主动语态"allowsb.todosth."改为被动语态，就是"Sb.beallowedtodosth."。3.Ithinkteenagersshouldbeallowedto...我认为青少年应该被允许...*这是表达观点的常用句型，后接动词原形。其否定形式通常是"Idon'tthinkteenagersshouldbeallowedto..."(否定前移)。*例句：Ithinkstudentsshouldbeallowedtohavepart-timejobs.Idon'tthinkchildrenshouldbeallowedtoplaywithfire.4.ShouldIbeallowedtomakemyowndecisions?我应该被允许自己做决定吗？*这是情态动词"should"引导的一般疑问句的被动形式，用于征求意见或表达疑惑。*肯定回答：Yes,youshould./Yes,Ithinkso.*否定回答：No,youshouldn't./No,Idon'tthinkso.5.Needwe...?/Doweneedto...?我们需要...吗？*"need"既可以作情态动词，也可以作实义动词。*情态动词：NeedIfinishittoday?(否定：Needn't)*实义动词：DoIneedtofinishittoday?(否定：don'tneedto)*例句：Youneedn'tworryaboutme.(情态动词)Weneedtolearnfromeachother.(实义动词)三、核心语法聚焦：情态动词的被动语态本单元重点学习和运用情态动词的被动语态，这是中考的重要考点。1.构成：情态动词(can,may,must,should,need等)+be+及物动词的过去分词。*肯定式：主语+情态动词+be+过去分词+(bysb./sth.)*否定式：主语+情态动词+not+be+过去分词+(bysb./sth.)*疑问式：情态动词+主语+be+过去分词+(bysb./sth.)?2.用法与例句：*can(能，会)/could(过去式)*Active:Wecanfinishtheworkintwodays.*Passive:Theworkcanbefinishedintwodays.(这项工作能在两天内完成。)*may(可以，可能)*Active:Youmayputyourbikehere.*Passive:Yourbikemaybeputhere.(你的自行车可以放在这里。)*must(必须，一定)*Active:Wemustobeytheschoolrules.*Passive:Theschoolrulesmustbeobeyed.(校规必须被遵守。)*should(应该)*Active:Weshouldhelptheold.*Passive:Theoldshouldbehelped.(老人应该被帮助。)*【本单元核心】Teenagersshouldbeallowedtomaketheirownchoices.3.提示：*情态动词本身没有人称和数的变化。*“by+动作执行者”表示“被谁...”，如果动作执行者不明确或不重要，可以省略。*在变为否定句时，直接在情态动词后加"not"。四、练习题I.根据句意及首字母提示补全单词。1.Youarenota______tosmokeinpublicplaces.2.It'sadifficultd______,butyouhavetomakeitbyyourself.4.Weshouldlearnhowtod______withourproblemsinlife.5.Heiss______abouthisworkandneverbelate.II.用括号内所给单词的适当形式填空。1.Studentsshouldbeallowed______(choose)theirownhobbies.2.Myparentsdon'tallowme______(stay)uplateonschoolnights.3.Thehomeworkmust______(finish)beforedinner.4.Youneedn't______(worry)aboutme.I'moldenough.5.Doyouthinkweshould______(allow)tohavemobilephonesatschool?III.将下列句子改为被动语态。1.Ourteacherallowsustousedictionariesinclass._________________________________________________2.TheyshouldfinishtheprojectbyFriday._________________________________________________3.Wemustobeythetrafficrules._________________________________________________4.Mymothermakesmepracticethepianoeveryday._________________________________________________(改为：I________________________thepianoeverydaybymymother.)IV.单项选择。1.Teenagers______allowedtodriveinmostcountries.A.arenotB.notareC.isnotD.notis2.You______wearsportsshoesinP.E.class.A.mustB.canC.shouldD.haveto3.Theproblem______byusyesterday.A.solveB.solvedC.wassolvedD.issolved4.—ShouldIbeallowedtogototheparty?—______.Youhaveatesttomorrow.A.Yes,youshouldB.No,youshouldn'tC.Yes,youcanD.No,youneedn't5.Ithinkstudents______tohaveatleastonehourforsportseveryday.A.shouldallowB.shouldbeallowedC.allowD.areallowingV.阅读理解。Shouldteenagersbeallowedtohavepart-timejobs?Differentpeoplehavedifferentopinions.Somepeoplethinkteenagersshouldbeallowedtohavepart-timejobs.Theybelievethatpart-timejobscanhelpteenagerslearnresponsibilityandhowtomanagemoney.Italsogivesthemachancetoseewhattheworkingworldislikeandhelpsthemdevelopsocialskills.Byearningtheirownmoney,teenagerscanunderstandthevalueofhardwork.Inmyopinion,teenagerscanbeallowedtohavepart-timejobs,butwithsomeconditions.Thejobshouldnotinterferewiththeirstudies.Theyshouldchoosesafeandappropriatejobs.Andparentsandteachersshouldgivethemguidanceandsupport.()1.Whatdosomepeoplethinkisabenefitofpart-timejobsforteenagers?A.Itmakesthemrich.B.Ithelpsthemlearnresponsibility.C.Itletsthemskipschool.D.Itmakesthempopular.()2.Whydosomepeopledisagreewithteenagershavingpart-timejobs?A.Theythinkteenagersaretooyoungtowork.B.Theythinkpart-timejobspaytoolittle.C.Theyworryitmayaffecttheirstudies.D.Theydon'twantteenagerstobeindependent.()3.Whatisthewriter'sopinion?A.Teenagersshouldneverhavepart-timejobs.B.Teenagersshouldhavepart-timejobswithoutanyconditions.D.Onlyrichteenagerscanhavepart-timejobs.五、参考答案与解析I.根据句意及首字母提示补全单词。1.allowed(不允许在公共场所吸烟。)2.decision(这是一个艰难的决定，但你必须自己做。)4.deal(我们应该学会如何处理生活中的问题。)5.serious(他对工作很认真，从不迟到。)II.用括号内所给单词的适当形式填空。1.tochoose(shouldbeallowedtodosth.应该被允许做某事)2.tostay(allowsb.todosth.允许某人做某事)3.befinished(mustbedone必须被做)4.worry(needn't后接动词原形，情态动词用法)5.beallowed(shouldbeallowed应该被允许)III.将下列句子改为被动语态。1.Weareallowedtousedictionariesinclass(byourteacher).(主动：Ourteacherallowsus...被动：Weareallowed...)2.TheprojectshouldbefinishedbyFriday(bythem).(主动：Theyshouldfinish...被动：Theprojectshouldbefinished...)3.Thetrafficrulesmustbeobeyed(byus).(主动：Wemustobey...被动：Thetrafficrulesmustbeobeyed...)4.Iammadetopracticethepianoeverydaybymymother.(主动：Mymothermakesmepractice...被动：Iammadetopractice...注意：make用于被动语态时，其后要加to)IV.单项选择。1.A(teenagers是复数，be动词用are；否定在are后加not)2