译林版九年级上册Unit 2 Teenage problems Grammar教学课件

Unit2TeenageproblemsGrammarLearningaims能掌握if或whether引导的宾语从句。能掌握连接代词和连接副词引导的宾语从句。LeadinActivity1UseObjectclausesintroducedbyiforwhethercorrectlyReadthetextsbelowandpayattentiontotheobjectclausesintroducedbyiforwhether.Thensummarizetheirusages.Amyoftenargueswithherbestfriendaboutsillylittlethings.Shewondersifthisisnormal,soshetalkstohermumaboutit.Sheaskswhethershehasanyadvice.Hermumtellshertotalktoherfriendaboutthesituation.Amywantstoimproveherfriendship,butsheisn’tsureiftalkingaboutitwillhelp.Weuseiforwhethertointroduceanobjectclausethatexpressesayes/noquestion.Suchanobjectclauseoftenfollowsverbssuchasask,see,wonderandfindout.Thewordorderintheclauseshouldbethesameasthatinastatement.Isthisnormal?Shewondersifthisisnormal.Shewondersifis

thisnormal.√×Weoftenusewhetherinsteadofifinformalsituations.Theteacherwantedtoknowwhetherthestudentswereunderalotofstress.由于if和whether连接的句子在语义上是一般疑问句或选择疑问句，因此要注意把从句语序改为陈述句语序。

一、由if/whether引导的宾语从句当宾语从句具有疑问意义时，可用if或whether引导。它们在句子中的意思是“是否”,不能省略。宾语从句结构II:主语+谓语动词+whether/if+宾从(一般疑问句，陈述语序)主语+谓语+whether/if+宾从(一般疑问句陈述语序)IsJuneagoodtimetovisitHongKong?(Iwonder)Iwonder

whetherJuneisagoodtimetovisitHongKong.Willtheyhavetheracesagainnextyear?(Hewonders)Iwonder

ifthey’llhavetheracesagainnextyear.Doeshelikereadingbooks?(Sheasks)Sheasks

ifhelikesreadingbooks.if或whether引导宾语从句时，作“是否”讲，一般情况下，两者常可换用。二者在下列几种情况下不能换用：1.宾语从句置于句首表示强调时，应用whether，不用if。如：Whetherthisistrueornot,Ican’tsay.这是否对，我不能说。2.宾语从句与ornot直接连用时，应用whether，不能用if。

如：Idon’tknowwhetherornothewillcometomorrow.我不知道他明天是否来。3.与动词不定式连用时，只能用whether。如：Shecan’tdecidewhethertogotoAmerica.她不能决定是否去美国。4.从句作介词宾语时，只能用whether。如：IworryaboutwhetherIhurtherfeeling.我担心是否伤了她的感情。5.宾语从句的谓语动词是否定形式时，只能用if，不能用whether。如：Tomwantstoknowifshewon’tcomeheretomorrow.汤姆想知道她明天是否不来这儿。6.if意为“假如，如果”时，可以引导条件状语从句，而whether没有这个用法。如：IfSimoncomesheretomorrow,I’llcallyou.假如西蒙明天来这儿，我将打电话告诉你。主句现在时，从句可使用任何时态；主句过去时态，从句一律使用过去时态。当宾语从句是客观真理或不可改变的自然现象时，宾语从句须用一般现在时，不受主句时态的限制。Ithink

thatyouareright.LinTaothought

theTVplaywasveryboring.

Ourteachertoldusthatlighttravelsfasterthansound.宾语从句的时态取决于主句的时态。二、宾语从句的时态变化宾语从句三要素引导词that+陈述句

if／whether+一般疑问句

陈述语序

时态主句为一般现在时从句可为任何时态主句为一般过去时从句一般过去时过去将来时过去进行时过去完成时语序宾语从句的语序都为陈述句语序客观真理时态不变A1Amyiswritingadiaryentryaboutherstudies.Completeitbelowusingthatorif/whether.IjusthadmyHistoryexam,andIdon’tknow(1)______________Ipassedit.Iknow(2)______________Itriedmybest,butI’mnotsure(3)______________that’sgoodenough.I’llhavetowaittofindout.Ireallyhope(4)______________Idowellinschoolthisyear.That’swhyIworksohardeveryday.I’mnotsure(5)______________Ineedtodomore.Iwonder(6)______________itwouldimprovemygradesorjustmakememorestressed.Fromthebottomofmyheart,Ijustwanttosucceedandfeelproudofmyself.thatif/whetherif/whetherthatif/whetherwhetherExerciseA2Talkwithyourpartneraboutyourlearningproblems,usingobjectclausesintroducedbyiforwhether.Activity2UseObjectclausesintroducedbyquestionwordsReadthetextsbelowandpayattentiontotheobjectclausesintroducedbyquestionwords.Thensummarizetheirusages.Teenagersoftenhaveproblemswiththeirparents.Theydonotalwaysunderstandwhytheirparentshavesomanyrules.Althoughthisisacommonproblem,manyteenagersdonotknowwhattheyshould.Theyarenotsurehowtheycanhaveanhonestdialoguewiththeirparents.Theydonotknowwhotheycanaskforadvice.Weuseaquestionwordtointroduceanobjectclausethatexpressesawh-question.Thewordorderintheclauseintroducedbyaquestionwordshouldbe_____________(differentfrom,thesameas)thatinawh-question.differentfrom宾语从句可由连接代词what、who、whom、whose、which等引导，它们在宾语从句中充当主语、宾语、表语、定语等，因此不能省略。1.疑问代词引导的宾语从句who在宾语从句中作主语what在宾语从句中作宾语whose在宾语从句中作定语①

Doyouknowwhowillcometomorrow?②

Doyouknowwhattheyaretalkingabout?③

Heaskedwhosebikethiswas.

你知道明天谁来吗？你知道他们在说什么吗？他问这是谁的自行车。宾语从句可由连接副词when、where、how、why等引导，它们在宾语从句中作状语，不可以省略。2.连接副词引导的宾语从句①

Doyouknowwhentheywillvisitthemuseum?②

Yourcoatlooksverynice.Couldyoutellmewhereyouboughtit?③

CouldyoupleasetellmehowIcanreadtheword?你知道他们什么时候参观这个博物馆吗？你的外套看起来很好看。你能告诉我你在哪里买的吗？你能告诉我怎么读这个词吗？④Idon'tknowwhyhehasn'tcomeyet.

我不知道他为什么还没来。how在宾语从句中作方式状语when在宾语从句中作时间状语where在宾语从句中作地点状语why在宾语从句中作原因状语陈述句做宾语从句时，仍然用原陈述语序；疑问句作宾语从句时，原来的倒装语序要改为陈述语序。二、宾语从句的语序把下列句子合并为宾语从句。1.TheseflowersarefromYunnan.MissChi

said.2.Dotheywantfriedchicken?Heaskedtheboys.3.Wheredotheylive?Doyouknow?MissChisaidthat

theseflowerswerefromYunnan.Heaskedtheboys

if/whethertheywantedfriedchicken.Doyouknow

where

theylive?主句的主语或间接宾语和宾语从句的主语一致时，由关联代词、关联副词引导的宾语从句可以转化为“疑问词+不定式”的结构。①

Hedidn'tknowwhathecoulddo.

Hedidn'tknowwhattodo.②

CouldyoutellmehowIcangettothestation?

Couldyoutellmehowtogettothestation?三、宾语从句的时态1.主句使用现在时，从句可使用任何时态；宾语从句的时态取决于主句的时态，分为以下三种情况：①

Hesays(that)hewillleaveamessageonherdesk.②

DoyouknowhowAmycametoschoolthismorning?③

Couldyoutellmewherethenearesthospitalis?Couldyoutellme...?

等表示委婉请求的问句中，could不表示过去，因此从句的时态不受其影响。2.主句使用过去时态，从句一律使用过去时态。①

Themantoldmethathewaslookingforhisson.②

Thepolicewomanaskedthelittleboywherehelived.3.当宾语从句是客观真理或不可改变的自然现象时，宾语从句须用一般现在时，不受主句时态的限制。Ourgeographyteachersaidthattheearthgoesroundthesun.ExerciseB1TheClass1,Grade9studentsaretalkingabouttheirproblems.Completeeachobjectclausebelowwiththecorrectquestionword.KittyPeterMyparentsoftensticktotheirownideas.Idon'tknow_____________IcancommunicatewiththemIneedsomeonetosharemyworrieswith.Iwonder_____________Ishouldgotoforhelp.howwho/whomI’vetriedmybest,butIdon'tunderstand_____________Istillgetlowmarks.Myparentsoftencomehomeverylate.SometimesIdon'tknow_____________Icantalktothem.AmySandywhywhenSometimesI'mcareless.Iwonder_____________Icanbemorecareful.Ioftenhavedifficultyinexpressingmyself.Whocantellme_____________Ishoulddo?PaulSuzyhowwhatB2Danielhassomequestions.Rewritehisquestionsbyusingobjectclausesintroducedbyif/whetheroraquestionword.1WhydidIarguewithmyfriendsyesterday?CanIexplain______________________________________________?2CanMilliehelpmegetalongwellwithmyfriends?I

wonder

__________________________________________________.3WherecanIfindusefularticlesonfriendship?

Iwanttoknow_____________________________________________.IthinkIneedtolearnmoreaboutfriendship.whyIarguedwithmyfriendsyesterdayif/whetherMilliecanhelpmegetalongwellwithmyfriendsWhereIcanfindusefularticlesonfriendship4Howmuchsleepdoweneedeveryday?I

wonder

________________________________________________.5DoIneedtobuyanEnglishdictionary?Iamnotsure_____________________________________________.6Dothestudentsneedtoexerciseeveryday?Canyoutellme__________________________________________?7Whatwouldlifebelikewithoutscience?

Icannotimagine__________________________________________.howmuchsleepweneedeverydayif/whetherIneedtobuyanEnglishdictionaryif/whetherthestudentsneedtoexerciseeverydaywhatlifewouldbelikewithoutscienceSandy:Doyoueverfeellonely,Millie?Iknow(1)______________Ioftenfeelthatway.ButI’mnotsure(2)______________that’snormal.Millie:Yes,sometimesIfeellonelytoo.Sandy:Doyouhaveanyadvice?I’mneversure(3)______________Ishoulddoaboutit.Millie:Iusuallytalktomyparents.Thathelpsme.ButIdon’tknow(4)______________itwillworkforyou.Sandy:I’lltry,butmyparentsarealwaysbusy.SoIdon’tknow(5)______________else