会计学Lesson140WasJohnansweringthetelephone?WhichJohn?/Isthatyou,John?Unit70//1extraadj.额外(éwài)的;附加的companyn.公司(ɡōnɡsī)；伴侣；朋友linen.线路(xiànlù)；绳索；排；列；行Isthatyou,John?MywifewantstoknowifMaryneedsanyhelp.Idon’tknowifhewillcome,ifhecomes,pleasetellme.if引导宾语从句(cónɡjù)时，作“是否”讲。一般情况下，可与whether换用，但在口语中多用if。Idon’tknowwhetherhewillcome,ifhecomes,pleasetellme.if或whether引导的是宾语从句，就一定有宾语从句的特点：1.从句用陈述句语序。2.从句应和主句(zhǔjù)的时态保持一致。Ican’tdecidewhethertostay.Iwanttoknowwhetherit’sgoodnewsornot.Hisfatherisworriedaboutwhetherhelosehiswork.Whethertheycanfinishtheworkontimeisstillaproblem.Couldyoutellmeifyouknowtheanswer?Couldyoutellmewhetheryouknowtheanswer?你能告诉(ɡàosù)我你是否知道答案吗？如果你知道答案，请告诉(ɡàosù)我，好吗？用if会引起歧义时，用whether。小结(xiǎojié)1.他走过来看他的猫是否(shìfǒu)出了问题。Hecametoseeif(whether)therewassomethingwrongwhithhiscat.2.汤姆问我是否(shìfǒu)看过这本书。Tomaskedmeif(whether)Ihadreadthebook.一、()1.Thegirlsaskedifthey____somefoodanddrinkwiththem.A.tookB.takeC.takesD.willtake()2.Catherinesaidthatshe___toGuangzhou.A.hasnevergoneB.hadnevergoneC.hasneverbeenD.hadneverbeen()3.Thestudentswanttoknowwhetherthey___dictationtoday.A.hadB.has.C.willhaveD.are()4.SheaskedLindaif___goandgetsome.A.couldsheB.shecouldC.shecanD.shemay()5.Lindasaidthemoon___roundtheearth.A.travelledB.hastravelledC.travellsD.hadtravelledCABA//////////////////HomeworkIwanttoknowifyouarelate.Tellmeifyouarelate.Iwanttoknowwhyyouarelate.Tellmewhyyouarelate.//