1、 What can be inferred from the last sentence of the paragraph above?If everyone were to buy one soft-drink can each day and throw it away,the whole country would soon be covered with rubbish.If+主语主语+were to do sthshould do sthdid sth 主语主语+would/could should/might do sth What would have happened if t
2、he captain had not been on board?the ship would have sunk with all on board if it had not beenIf+主语主语+主语主语+would/could should/might have done sthhad done sth一：含一：含IF条件句的虚拟语气条件句的虚拟语气If 条件句条件句 主主 句句pastnowfuturehad+done would/could/might/should +have donedid/were would/could/might/should +dodid/weresh
3、ould dowere to+do1.如果你早来5分钟，你就赶上这趟车了。If you _ here five minutes earlier，you _ the bus.2.如果我现在不忙，我就来帮你了。If I _ not busy,I _ you now.3.如果明天下雪了，我们怎么办？What _ we do if it _tomorrow?had gotwerewould helpshould were to snowWould have caughtIf I _busy last night,I _ to see the film with you.had not beenwoul
4、d have goneIf he more carefully,he the car accident yesterday.would not have had had driven If he _(not receive)the infected blood transfusion that day,had not receivedhe(not infect)with AIDS.could not have been infectedIf I _(know)your telephone number,I _ (telephone)you yesterday.had knownwould ha
5、ve telephonedn省略if,用“were,had,should+主语”.例如:Were I in school again,I would work harder.Had you been here earlier,you would have seen him.Should there be a meeting tomorrow,I would come.但在虚拟条件状语从句中,省略连词的倒装形式的句首不能用动词的缩略形式,如我们可以说:Were it not for the expense,I would go to Italy.但不能说Werent it for the exp
6、ense,I would go to Italy.二：虚拟语气特殊型：二：虚拟语气特殊型：1.Wish 的宾语从句现在：过去：未来：过去时（were）过去完成时would/could/might+V.should1.I wish I were a bird.（现在）（现在）2.I wish I hadnt made such a mistake.（过去）（过去）3.We wish our parents wouldnt punish us.（将来）（将来）2.as if/though+Clause 现在：过去：过去时过去完成时She loves the baby as if it were h
7、er own son.I remember the whole thing as if it had happened yesterday.后接虚拟语气，表示不可能或不真实的事或情形。3.Would rather that现在：过去：未来：I would rather you paid me now.I would rather you had gone,too.Dont come.I would rather you came tomorrow.过去时过去时过去完成时4.Its(about/high)time+that should+V.过去时我们该去睡觉了。Its time that we
8、 went to bed.Its time that we should go to bed.5.表示要求，命令，建议的虚拟语气。这些动词后面的宾语从句要使用虚拟语气用法。即从句中的动词 使用should+动词原形，或者将should省略。一坚持一坚持二命令二命令三建议三建议四要求四要求insistorder,commandadvise,suggest,proposedemand,require,request,desire 注意：注意：insist 表示表示“坚持说坚持说”时时,后后面从句不用虚拟语气面从句不用虚拟语气.如如:She insisted that he had stolen h
9、er bike.Suggest 表示表示“暗示暗示”,“表明表明”时时,后面从句中不用虚拟后面从句中不用虚拟.如如:Her pale face suggests that she is ill.注意：以上动词相应的名词构成的注意：以上动词相应的名词构成的名词性从句包括主语从句，表语从名词性从句包括主语从句，表语从句和同位语也要使用虚拟语气。从句和同位语也要使用虚拟语气。从句中的动词形式一样。句中的动词形式一样。order,advice,suggestion,order,advice,suggestion,proposal,demand,request,proposal,demand,request,desiredesire 6.without 和和 but for 构成的虚拟。构成的虚拟。Without sunlight,peoples life would be different from today.But for your help,I wouldnt have finished the work.7.If only 引导的虚拟。要是引导的虚拟。要是就好了就好了 If only I knew his name!If only we had followed your advice!If only I could see him again!
