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1、Unit1 ArtGrammar虛擬語氣在“if”條件句中的使用：含義if從句的謂語形式主句的謂語形式與現(xiàn)在事實(shí)相反v.-ed/werewould/should/could/might+v.(原形)與過去事實(shí)相反haddonewould/should/could/might+have+v.-ed與將來事實(shí)相反1.v.-ed/were2.should+v.(原形)3.weretodowould/should/could/might+v.(原形)（一）與現(xiàn)在事實(shí)相反Iftherewerenosubjunctivemood,Eng
2、lishwouldbemucheasier.如果沒有虛擬語氣，英語會(huì)更加簡(jiǎn)單。IfIhadtime,Iwouldgothere.總結(jié)：表示與現(xiàn)在事實(shí)相反，if從句：一般過去時(shí)，主句：should/would/could/might+v.(原)（二）與過去事實(shí)相反1.Ifyouhadcomeearlier,youcouldhavecaughtthatbus.2.Ifhehadseenyouyesterday,hewouldhavereturnedyourbook.總結(jié)：表示與過去事實(shí)相反，if從句：過去完成時(shí)（had+v.ed
3、),主句：would/should/could/might+have+v.ed（三）與將來事實(shí)相反1.Ifheweretocometomorrow,heshouldhelpmewithmyphysics.2.Heheshouldseemetomorrow,hewouldknowme.總結(jié)：表示與將來事實(shí)相反，if從句：一般過去時(shí)/should+v.(原)/wereto+v.(原)，主句：would/should/could/might+v.(原)四、練習(xí)鞏固I.根據(jù)首字母或漢語提示，填入正確的單詞。1.Theword“adv
4、ice”isana_________noun.1.Artisinfluencedbythecustomsandf______ofpeople.2.Althoughthesuncamethroughthewindow,mostoftheroomsstayedins_____.3.Howr___________itisthatacountrywithsomuchrainshouldbeshortofwater.4.Theprisonersa_________toescape,butfailed.II.用所給單詞的適當(dāng)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..使用虛擬語氣改寫下列句子,句意保持不變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
