betodosth的几种用法

1、be+todosth.的用法1 ,表小按计划或安排要做的事。例如：Whenareyoutoleaveforhome你什么时候回家Sheistobemarriednextmonth.她将于下个月结婚。TheQueenistovisitJapaninaweek'stime.女王将于一周后访问日本。这种结构也可用于过去。was/weretodosth.表示曾经计划要做的事，但不表明计划是否被执行，或表示“命运（即命中注定要发生的事）工而非计戈IJ;was/weretohavedonesth.表示未曾实现的计划。例如：IfeltnervousbecauseIwassoontoleavehome

2、forthefirsttime.我/感至lj很紧张，因为我很快就要首次离开家了。Theysaidgoodbye,littleknowingthattheywerenevertomeetagain.彳也们告了别,不知道以后再也不会见面了。Weweretohavetoldyou,butyouwerenotin.我们本来想告诉你的，但是你不在家。2 .表示“应该"，相当于should,oughtto。例如：Youaretoreporttothepolice.你应该报警。Whatistobedone应该怎么办呢3,表示“必须”，当于must,havetoo例如：Theletteristobe

3、handedtohiminperson.这封信必须亲手交给他。YouaretodoyourhomeworkbeforeyouwatchTV.看电视之前你得先做完作业。4,表示“想，打算”，相当于intend,want。例如：Ifwearetobetherebeforeten,wellhavetogonow.如果我们要在十点前到,我们现在就得走。5 .用广第一人称疑问句,表小征求对方益见。例如：AmItogoonwiththework要我继续完成这项工作吗Whatarewetodonext我们下一步该怎么办6川于否定句，公小“禁止”，相当于mustn't。例如：Thebooksinthi

4、sroomarenottobetakenoutside,这个室内的书籍不得带出室外。Youarenottosmokeinthereading-room.你不可以在阅览室里吸烟。7 .小“可以，可能"，相当于may,can。例如：Thenewsistobefoundintheeveningpaper.这条消息可以在晚报上见到。Suchpeoplearetobefoundeverywhere.这种人至lj处都有。Sheisnowheretobefound.在哪里也找不着她。todosth.用丁if或evenif/eventhough从句中,表示对未来的假设。例如：IfIweretotel

5、lyouthatIkilledhim,wouldyoubelieveme要是我告诉你是我杀了他，你会相信吗Evenifthesunweretoriseinthewest,Iwouldneverdosuchathing.即使太阳从西边出来，我也决不做这种事。toblame（该受责备，对某坏事应负责任）与betolet（待出租）两种结构中，用不定式的主动形式表示被动含义。例如:Whichdriveristoblamefortheaccident这事故是哪个司机的责任Thishouseistolet.这房子要出租。Exercise1. Wehavebeenlookingfortheboyallthe

6、afternoonbutheisnowhere.A.toseeB.seeingC.seenD.tobeseen2. Asearlyashissecondfilm,Chaplinhaddevelopedhisownmannerofacting,theonethatworldfamous.A.wouldbecomeB.becameC.wastobecomeD.hadbecome3-WejustsawJohnatthebookstore.-That'sstrange;Ididn'tthinkhebackuntiltomorrow.A.willcomeB.wastocomeC.isco

7、mingD.istocome4. ThefinalexaminationearlyJuly.A.istobeheldB.istobetakenplaceC.isgoingtoholdD.willbetotakeplace5. Ifthesuntomorrow,whatwouldwedoA.werenottoraiseB.doesnotriseC.wouldnotriseD.werenottorise6. Anewhospitalwastointhisdistrict,butthemoneywasn'tcollectedyet.A.havebeenbuiltB.bebuiltC.buil

8、tD.havebuilt7. Lookattheseclouds.A.It'sgoingtorainB.It'srainingC.ItistorainD.Itcanrain8. Whodoyouthinkforthefailureoftheirmarriage.A.toblameB.tobeblameC.istoblameD.istobeblamed9. Neitheryounorhetothefront.A.aretobesentB.istobesentC.havetobesentD.istosend10. Itobedwhentherewasaknockatthedoor.A. wentB.amgoingtoC.wastogoD.wasabouttogoweagainnextweek-Yes,let*smakeitnextWednesday.A.Are;t