英语新课标(WY)·八年级下册单元语法聚焦九语法点击whether/if及疑问词引导的宾语从句本模块主要学习另外两类宾语从句——whether或if引导的宾语从句和疑问词引导的宾语从句。一、whether或if引导的宾语从句1.whether/if引导宾语从句时,意为“是否”,表达不确定的概念,常位于动词ask,see,say,know,findout等后面。一般情况下,两者可互换,在口语中多用if。Nobodyknowswhether/ifitwillraintomorrow.没有人知道明天是否会下雨。Lucyaskedwhether/iftheyhadacottonsweater.露西问他们是否有棉制的毛衣。2.whether/if引导宾语从句时,要注意三方面,即连词、语序和时态。(1)whether/if在句中不能省略。Idon'tknowif/whetherhewillcomeheretoday.我不知道他今天是否会来这儿。(2)whether/if引导的宾语从句,其从句语序应用陈述语序。Didyouknowthewaytothehospital?Theoldwomanaskedme.→Theoldwomanaskedmeif/whetherIknewthewaytothehospital.老妇人问我是否知道去医院的路。(3)whether/if引导的宾语从句,其时态应和主句的时态单元语法聚焦九保持一致。即当主句为一般现在时态时,从句可根据实际情况选择不同时态;当主句为一般过去时态时,从句一般使用相应的过去时态。Idon'tknowif/whetherhehascomehere.我不知道他是否已经来这儿了。Tomaskedif/whetherIhadreadthebook.汤姆问我是否读过这本书。3.whether/if的区别:(1)在动词不定式之前只能用whether。例如:Ican'tdecidewhethertostay.我不能决定是否留下。单元语法聚焦九(2)在固定结构“whether…ornot”中,只能用whether。Iwanttoknowwhetherit'sgoodnewsornot.我想知道它是否是好消息。(3)在介词后,只能用whether。Hisfatherisworriedaboutwhetherhemaylosehisjob.他的父亲担心他是否会失去工作。二、疑问词引导的宾语从句1.在引导词上,要将疑问代词或疑问副词变为连接代词或连接副词,引导宾语从句。Whosebikeisthis?Doesanybodyknow?→Doesanybodyknowwhosebikethisis?单元语法聚焦九2.在时态上,宾语从句的时态应与主句的时态保持一致。Whenwillthetrainarrive?Heaskedme.→Heaskedmewhenthetrainwouldarrive.3.在语序上,要将疑问句语序改为陈述句语序。Whichonedoyoulikebest?Sheaskedme.→SheaskedmewhichoneIlikedbest.注意:疑问句中主语之前的助动词若是do/does/did,变为宾语从句时,要先将其去掉,谓语动词再根据时态作相应的变化。4.特殊疑问词在句中作主语,变为宾语从句时,语序不变(时态应作相应变化)。例如:Whocananswerthequestion?Theteacherasked.单元语法聚焦九→Theteacheraskedwhocouldanswerthequestion.5.特殊疑问句变为宾语从句后,用问号还是用句点完全取决于主句的句式:如果主句为陈述句或祈使句,句末就用句点;如果主句是疑问句,句末就用问号。Idon'tknowwhenweshallstarttomorrow.Doyouknowwhenweshallstarttomorrow?单元语法聚焦九实战演练Ⅰ.单项填空()1.[2013·乌鲁木齐]—Couldyoutellme________?—BysearchingtheInternet.A.howdidMonagettheinformationB.whyMonagottheinformationC.howMonagottheinformationD.whydidMonagettheinformation单元语法聚焦九()2.[2013·包头]—Pleasetellme________thescarf?—Sheboughtitonline,Iguess.A.ifAlicelikedB.whenAliceboughtC.whereAliceboughtD.howmuchdidAlicepayfor()3.Idon'tknow________ornottheywillcometohelpus.A.whetherB.ifC.thatD.when单元语法聚焦九()4.[2013·三亚]—Betty,doyouknowifTony________thephotocompetition?—Hewill,ifhe________thisprojectonAustralia.A.enters;finishesB.enters;willfinishC.willenter;finishesD.willenter;willfinish()5.[2013·黔东南]Ourphysicsteachertolduslight________fasterthansound.A.travelsB.travelledC.travellingD.totravel单元语法聚焦九()6.[2014·滨州]Excuseme,canyoutellme________?A.whendoestheplaneleaveB.howlongtheplanehasleftC.whentheplaneleavesD.whendidtheplaneleave()7.[2013·梅州]Couldyoutellme________ameetinginGuangzh...