（虚拟语气）If条件从句主句与现在事实相反Ifsb.+过去式（be的过去式是were）sb.+would(should,could,might)+动词原形与过去事实相反Ifsb.+haddonesb.+would(should,could,might)+havedone与将来事实可能相反Ifsb.+A.过去式B.weretodoC.should+动词原形sb.+would(should,could,might)+动词原形非真实条件句中谓语动词形式一、单项选择1.Whatwouldhavehappenedifyou________herchild?A.hadn’thelpedB.couldn’thelpC.wouldn’thelpD.didn’thelp题干主句中用了wouldhavehappened，可见是对过去情况的虚拟，所以if从句中应该用过去完成时。所以正确答案是：A2.IfAlice________thisafternoon,themeetingwouldbeputoff.A.wouldnotcomeB.mightnotcomeC.shouldnotcomeD.couldnotcome题干主句中用了wouldbeputoff，且if从句中有时间状语thisafternoon，可见本题是对将来情况的虚拟，所以if从句中谓语动词可以用三种表达：1.过去式；2.weretodo；3.shoulddo。所以正确答案是：C3.IfI________withherlastsummer,I________withhernow.A.worked;amgettingonverywellB.hadworked;wouldgetonverywellC.hadworked;wouldhavegotonverywellD.hadworked;willgetonverywell本题由lastsummer可见if从句是对过去情况的假设，由now可见主句是对现在情况的虚拟，所以if从句中谓语动词该用过去完成时，主句谓语动词该用woulddo。所以正确答案是：B4.________yourletter,Iwouldhavestartedofftwodaysago.A.IfIreceivedB.ShouldIreceiveC.IfIcouldhavereceivedD.HadIreceived由主句可见本题是对过去情况的假设，所以if从句中谓语动词该用过去完成时，也可以省略if，把had提前，用倒装的形式表达。所以正确答案是：D5.Withoutsunlightorwaterorair,there________nolifeontheearth.A.willhaveB.wouldbeC.shouldbeD.mustbe本句是由without引出的含蓄条件句，根据句意，“没有阳光、水和空气，地球上就不会有生命。”所以主句中谓语动词该用therewouldbe。所以正确答案是：B6.Hewasverybusyyesterday.Otherwise,he_______tothemeeting.A.wouldcomeB.cameC.wouldhavecomeD.hadcome本句是由otherwise引出的含蓄条件句，本句中就等于Ifhehadnotbeenverybusyyesterday，是对过去情况的假设，所以主句中谓语动词该用wouldhavedone的形式。所以正确答案是：C7.Mysuggestionisthatwe________thesportsmeeting.A.wouldputoffB.shouldputoffC.couldputoffD.beputoff本句中that引导的表语从句，是说明mysuggestion的具体内容，所以从句中谓语动词该用should+V原形的形式，should可以省略。所以正确答案是：B8.Iwouldhavecomeearlier,butI_______thatyouwerewaitingforme.A.didn’tknowB.hadn’tknownC.wouldhaveknownD.haven’tknown本句中前半句是用了wouldhavedone的虚拟语气，是对过去情况的虚拟；但是but连接的分句，是用来说明过去所发生的事实的，所以句中谓语动词该用一般过去时。所以正确答案是：A9.IwouldhavegonetherewithyoubutI________tootiredthen.A.wereB.hadbeenC.wasD.havebeen本句中前半句是用了wouldhavedone的虚拟语气，是对过去情况的虚拟；但是but连接的分句，是用来说明过去所发生的事实的，所以句中谓语动词该用一般过去时。所以正确答案是：C10.Theteacheragreedtothesuggestionthatthestudents________twoweekstopreparefortheexam.A.giveB.shouldgiveC.begivenD.wouldbegiven本句中that引导的同位语从句，是说明thesuggestion的具体内容，所以从句中谓语动词该用should+V原形的形式，should可以省略。学生应该是被给时间，所以要用被动语态。所以正确答案是：C11.Itisstrangethatshe________so.A.thinkB.thinksC.willthinkD.thoughtIt’simportant/necessary/natural/strange…+that从句这种句型中，that引导的主语从句中谓语动词该用should+V原形的形式，should可以省略。Should表示“应该”或“竟然”的意思。本句意思是：真奇怪她竟然这么想。所以正确答案是：A12.Don’tcomethisafternoon.I’dratheryou________tomorrow.A.comeB.tocomeC.cameD.willcomewouldrather+that从句这种句型中，t...
