betodo的八种用法一、表示坚决的命令，可译为“必须”。1. Thisnaughtyboyistostayhereuntiltheclassisover.这个淘气的男孩必须在这里站到下课。2. Nooneistoenterthisbuildingwithoutthepermissionofthesecurityguard.未经保安人员的允许，任何人都不得进入这栋楼。二、表示“计划”或“安排的事项”。3. Bettyistobemarriedsoon.贝蒂很快就要结婚了。4. Aninsuranceagentistomeetusthisafternoon今天下午会有一个保险代理人来跟我们见而。三、表示“奇能性”。5. Areyoutopaythedebtforyourwife?你会不会帮你的妻子还债？6. Thelovelypuppyisnowheretobefound.哪儿也找不到这只可爱的小狗？四、表示“意图”“决心”或“打算”。7. Ifyouaretobethereontime,youhadbetterhuiry.要想准时到达那儿，你最好快点。&Ifallofusaretoremainfriendly,wemustbesincerewithoneanother.要想保持友谊，我们者K必须真诚相待。五、表示“应该”。9. Youhavedonesowell.Youaretoberewarded你做得很好，你应该受到奖赏。10. Suchnastyquestionsaretobeavoided该避免这种下流的问题。11?Youaretocallthepolice.你应该报警。六、表示“注定”“不可避免”“必然会发生”。Annewaswonderingwhatwastobecomeofherboyfriend.Tommy?安妮不知道她的男朋友托米会出什么事。12. Themurdererwassentencedtolifeimprisonmentandwasnevertoseehisfamilyagain人犯被判终身监禁并且永远不能和家人见而。13. Shedidnotthinktoomuchofherunkindacts?However,theyweretobeharmfultoherself,too?她对她不友好的行为并没有想太多，然而，这些行为必将给她带来不利。14. Tomwasntworriedabouthisheadinjury,butitwastobetroublesomeforhimlater.汤姆并不担元他头部的损伤，但是以后这损伤必将给他带来麻烦。15. Youaretoanswerforwhatyouhavedone你必将为你所做的事承担后果。七、用于虚拟语气，表示一种假设。16. IfIweretodoit,Iwoulddoitwell.这件事如果我来做,我会做好它。17. Evenifyouweretotakeataxinow,youwouldnotbeabletoarriveatyourdestinationontime?你现在即使坐出租车，你也不会准时到达目的地的。八、有“期待将来”的含意。Theactualusefulnessofthenewlyinventedequipmentisstilltobedetermined.这种新发明出来的设备的实用性如何还有待观察。Henrysappointmentwiththeaccountancyfirmisyettobeconfirmed.亨利与这家会计事务所的约定还有待确认。Exercises:1.ThisfilmthisSunday.2. A.isgoingtoshowB.isshowingC?istobeshownD?willhavebeenshowThestudentsweretoldthattheyattheschoolgateat2:00thefollowingafternoon.3. A.metB.willmeetC?weretomeetD.weremetThehousereadytodaybutastherehasbeenabuildertrikeitisstillonlyhalffinished.A.isB.wastobeC?wasD.wastohavebeen4.1nsuchdryweather,theflowerswillhavetobewateredifthey?5. A.havesurvivedB?aretosurviveC.wouldsurviveD?willsurviveHowIwhathasbecomeofhim?6. A.am:toknowB.am;knowingC?was;toknowD.will;knowhetomorrow,Iwouldgotomeethimatthestation.A.Were;tocomeB.Was;comingC?Did:comeD.Would:comeKeys:CCDBAA（注：文档可能无法思考全面，请浏览后下载，供参考。可复制、编制，期待你的好评与关注）