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1、Unit1 ArtGrammar虚拟语气在“if”条件句中的使用：含义if从句的谓语形式主句的谓语形式与现在事实相反v.-ed/werewould/should/could/might+v.(原形)与过去事实相反haddonewould/should/could/might+have+v.-ed与将来事实相反1.v.-ed/were2.should+v.(原形)3.weretodowould/should/could/might+v.(原形)（一）与现在事实相反Iftherewerenosubjunctivemood,Eng
2、lishwouldbemucheasier.如果没有虚拟语气，英语会更加简单。IfIhadtime,Iwouldgothere.总结：表示与现在事实相反，if从句：一般过去时，主句：should/would/could/might+v.(原)（二）与过去事实相反1.Ifyouhadcomeearlier,youcouldhavecaughtthatbus.2.Ifhehadseenyouyesterday,hewouldhavereturnedyourbook.总结：表示与过去事实相反，if从句：过去完成时（had+v.ed
3、),主句：would/should/could/might+have+v.ed（三）与将来事实相反1.Ifheweretocometomorrow,heshouldhelpmewithmyphysics.2.Heheshouldseemetomorrow,hewouldknowme.总结：表示与将来事实相反，if从句：一般过去时/should+v.(原)/wereto+v.(原)，主句：would/should/could/might+v.(原)四、练习巩固I.根据首字母或汉语提示，填入正确的单词。1.Theword“adv
4、ice”isana_________noun.1.Artisinfluencedbythecustomsandf______ofpeople.2.Althoughthesuncamethroughthewindow,mostoftheroomsstayedins_____.3.Howr___________itisthatacountrywithsomuchrainshouldbeshortofwater.4.Theprisonersa_________toescape,butfailed.II.用所给单词的适当形式完成句子
5、。1)Ifyouhadbeenhereyesterday,you_______________________(see)her.2)IfI_______________(notcome)toworkinXinjiang,I_________________(notmeet)you,andI__________________(notknow)you.ButIdid.3)IfIwereyou,I________________(notbuy)abstractpainting.4)IfI________(be)inyourpos
6、ition,I_____________(accept)theiroffer.5)Ifhe____________________(come)tomorrow,we____________(be)greatlysurprised.6)Ifthesun_______________(rise)inthewest,I_______________(follow)you..使用虚拟语气改写下列句子,句意保持不变1.Shewillbegivenenoughmoney.Shewillbuythebook.Ifshe enoughm
7、oney,she thebook. 2.Hewantstocometotheparty,buthecan’tbecausehehastowork.He tothepartyifhe towork. 3.LiPingiseasygoing,soshehasanumberoffriends.Ifshe easygoing,LiPing anumberoffriends. 4.Heisnotfamiliarwithsoftware,soheisfiredbyhisboss.Ifhe familiarw
8、ithsoftware,he byhisboss. 5.Weknowlittleaboutthedisease,sowearenotabletotreatthepatientseffectively.Ifwe moreaboutthedisease,we abletotr
