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《Unit 4 Helping people around the world Grammar and usage 课件》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、Unit4HelpingpeoplearoundtheworldGrammarandusage件从句条If从句中的谓语形式主句中的谓语形式现在过去将来Revision:If虚拟语气过去时(did/were)would/could/should/might+V.（原）过去完成时would/could/should/might+have+p.p.1.过去时2.should+V.3.weretodowould/could/should/might+V.（原）PutthefollowingintoEnglish:1.如果我有钱就不住在这破楼里了。I
2、fIwererich,Iwouldnotliveinsuchabrokenbuilding.2.如果我昨天带钱就借给你了。3.如果我今后有钱了就会帮助更多的人。IfIhadhadmoneywithmeyesterday,Iwouldhavelentsometoyou.IfIgotrichinfuture,Iwouldhelpmorepeople.Unrealconditions:othercases虚拟语气Mixedconditionals:混合虚拟语气有时主句与从句所指的时间不一致，这叫错综虚拟语气或混合虚拟语气，它要求从句的时态根据实际
3、的时间概念来确定。1.IfIhadfinishedmyhomeworklastnight,IwouldbeallowedtowatchTVnow.如果我昨晚完成了作业，现在就被允许看电视了。（从句说明过去情况，而主句说明现在情况。）2.Ifyoutoldmethetruthnow,Iwouldnotsendforyourparentstomorrow.如果你现在告诉我实话，我明天就不请你家长来了。（从句说明现在情况，主句说明将来情况。）IfI_______________businessatuniversity,I____________a
4、managernow.IfIhadtakenanalternativepathand____________medicine,I____________alotofmedicalknowledge.IfI______alotaboutmedicine,I_________abletohelpmysickmother.IfI_________mysickmother,I___________soupset.hadnotstudiedwouldnotbehadstudiedwouldhaveknewwouldbecouldhelpwouldno
5、tbeCompletePartAonpage57:2.ImpliedConditionals:含蓄虚拟语气有时假设的条件不通过if条件句表达出来，而隐含在某些介词短语中，如with,without,butfor等，或者通过副词or,otherwise等上下文表示。1.Withoutyourencouragement,Iwouldn’thavesucceeded.(=Ifyouhadn’tencouragedme,Iwouldn’thavesucceededanyway.)没有你的鼓励，我不会成功的。例如：2.With(ifIhad)more
6、money,Icouldhelpmorepeopleinneed.3.Butforthe(iftherewasno)moneyyousentme,Iwouldstarvenow.4.Iamtoohungry,or/otherwiseIwouldnottrytoeatyou.(=IfIwerenotsohungry,Iwouldnottrytoeatyou.)3.Introducedbyevenif,asif/though,ifonly在evenif,asif/though,ifonly引导的从句表示与事实相反的情况时也使用虚拟语气。与现在事
7、实不符用一般过去时，与过去事实不符用过去完成时。例如：IwouldnevergothereevenifIweregiventhechanceto.Nicholasissmilingasifheknewnothingaboutit.MiketalksasthoughhehadbeentotheGreatWallbefore.IfonlyIwereaGoodwillAmbassador.Imitation:1.即使你有钱也不能这么浪费。Youshouldnotwasteevenifyouwererich.2.看上去他们好像吃错药似的。Itloo
8、kedasiftheyhadtakensomewrongmedicine.3.我女朋友逛起街来好像永远不知道累一样。Mygirlfriendgoesshoppingasthoug
