资源描述：
《专升本英语语法ppt课件.ppt》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、专升本英语语法Nowlet’slearngrammarhappily!基本类别基本结构形式：分过去、现在、将来等形式见下表名词性从句中用should+动词原形在宾语、主语、表语、同位语从句中从句中用过去式在特殊句型中虚拟语气基本结构/时态：时间条件从句主句对过去的假设动词过去式/werewould＋动词原型对现在的假设had+过去分词would+have+过去分词对将来的假设should/would/wereto+v./动词过去式would+v.现在IfIwereinyourplace,Ishouldth
2、inkdifferently.如果我在你的位置，我的想法会不同。IfIwereyou,Ishouldn’tdolikethat.如果我是你的话，我不会那样做。⑴条件从句中be一律用were,不分人称。但在口语中或非正式场合中，第一、三人称单数也可用was,现代美语更是如此。⑵主句中should用于第一人称单、复数，would用于其他人称单、复数。现代英语中would可用于第一人称。过去Ifwehadleftalittlelater,weshould/wouldhavemissedthetrain.如果我们
3、迟点走的话，我们就会错失火车了。IfIhadmether,Iwouldhavetoldher.要是我碰到她的话，我就已经告诉她了。将来Ifhecametomorrow,hewouldknowit.如果他明天来的话，他就会知道了。Ifsheweretogotheretomorrow,shewouldmeethim.如果她明天到那里去的话，她可能会遇到他的。Note虚拟语气的主句中的除了用would当助词外还可用should,could,might等作助词；当虚拟条件句含有were,had,should时，可
4、以省略if，而把were,had,should移到主语之前，即使用倒装句；虚拟条件句还可以使用：Ifitwerenotfor…=Wereitnotfor（要不是/如果没有…或Ifithadnotbeenfor（Haditnotbeenfor）eg.1.Ifwehadleftalittleearlier,wewouldhavecaughtthebus.→Hadweleftalittleearlier,wewouldhavecaughtthebus.如果我们早点走，就可以赶上公共汽车了。2.IfIwerein
5、hisplace,Iwouldtrymybest.→WereIinhisplace,Iwouldtrymybest.如果我在他的位置，我会尽我所能的。exercise1I____youamorevaluablepresentforyourbirthday,butIwasshortofmoneyatthattime.muchhaveboughtB.hadboughtC.wouldhaveboughtD.wouldbuyKey:Cexercise2Ifshecouldsew,she_______herself
6、ashirt.A.hadmadeB.willmakeC.wouldhavemadeD.madeKey:Cexercise3_______hecome,theproblemwouldbesettled.WouldB.ShouldC.ShallD.IfKey:Bexercise4______hewouldhavesucceededintheexaminations.IfhehasworkedhardB.IfheworkshardC.IfheworkedhardD.HadheworkedhardKey:Dexe
7、rcise5Whatwouldyoudoifthewar____________.wouldbreakoutB.weretobreakoutC.willbreakoutD.isbrokenoutKey:B错综条件句Ifhe______hislegsyesterday,he_____withusnow.hadn’thurt;wouldgohadn’thurt;wouldhavegonedidn’thurt;wouldgodidn’thurt;wouldhavegone√错综条件句是指条件从句中的动作和主句的
8、动作发生的时间不一致。e.g.Ifshehadn’tstudiedhard,shewouldn’tspeaksowell.省略if的倒装句e.g.Iftheywerehere,theywouldhelpus.如果从句中有were，should，had等词，可省略if，并把were，should，had放句首进行倒装。Ifyouhadcomeearlier,nothingwouldhavehappened.Weretheyher
