1、、 虚拟语气用于if条件状语从句。与时态有关1. 不同时间段，if主从句分别使用的时态。If条件状语从句主句现在Did/ wereCould/would/might/should do 过去had done sthCould/would/might/should have done将来did / wereshould do sthwere to do sthCould/would/might/should do祈使句If it rained (rain), dont expect me .2.If 的省略：把从句中should , had, were提前, if 可以省略。3.错综时间条件句：
2、If you had taken (take ) the medicine , you would feel (feel) better now .4.虚拟条件句中可含有陈述语气的从句：If it were (be ) not for that fact that you was (be ) ill , I would ask (ask) you to do this right now .5. 含蓄条件句：时态跟主句含有介词或是介词短语under, with, without, but that 含有连词 : or, otherwise, but, but that But for your
3、 help , I would have failed (fail ) then .I was busy , otherwise I would have given ( give ) you more help .6.“如果没有 If it was not for sth，表示同现在事实相反的假设。 “如果当时没有 If it had not been for sth，表示同过去事实相反的假设。If it were not for the rain , the crops would die (die ) .If it had not been for your timely help ,
4、I would have been failed ( fail ) .7、虚拟语气用于wish , if only ,as it (though) 等句中用法谓语动词形式与现在事实相反 did / were与过去事实相反had done sth / could have done sth与将来事实相反would / could/ might do sth8、虚拟语气在would rather 后接从句的应用： 现在/将来 sb did sthWould rather +从句 过去： sb had done sth9、 sb did sth Its (high/about)time that s
5、b should do sth sb were doing sth与should 有关1、虚拟语气在某些从句中的运用。二主张 insist， urge二命令 order ，command四要求 request, require, ask, demand四建议 advise , suggest, propose, recommendHe suggested that we (should) do sthIt is suggested that we (should) do sth He gave me a suggestion that we (should) do sthThe man ins
6、isted that he did / had done ( do ) nothing wrong and that he should be (be ) set free right away .His accent suggests that he comes ( come ) from the south .I suggested that we carry out (carry) out the plan.The order came that the medical supplies should be sent (send ) to the village soon .2、Its
7、+ strange, important, essential, natural that sbshould + do sth Its + a pity/ a shame / no wonder that sbshould + do sth 虚拟语气专项练习题( )1. The teacher demanded that the exam _ before eleven. A. must finishB. would be finished C. be finishedD. must be finished ( )2. She made the demand that the journali
8、sts _ at once _ Iraq. A. leave; for B. leave; to C. left; to D. to be left; for ( )3. He is talking so much about America as if he _ there. A. had been B. has beenC. wasD. has gone ( )4. The young man insisted that he _ nothing wrong and _ free. A. did; setB. had done; should be set C. should do; be
9、 setD. had done; must be set ( )5. I suggested there _ be a kind of language all could understand and use _ . A. can; it B. /;/ C. would; it D. may;/ ( )6. The suggestion has been made _ the basketball game _ put off. A. for; to B. that; beC. which; should be D. to; being ( )7. The order came that t
10、he medical supplies _ to Beijing for the Sars soon. A. would be sentB. should send C. be sentD. must be sent ( )8. It is important that we _ wild animals. A. will protect B. should protectC. shall protect D. are protecting ( )9. Had you listened to the doctor, you _ all right now. A. areB. wereC. wo
11、uld be D. would have been ( )10. _ any change about the date, please tell me immediately. A. Will there beB. Should there beC. There will beD. There should be ( )11. _ today, he would get there by Friday. A. Would he leaveB. Was he leaving C. Were he to leaveD. If he leave ( )12. Should it rain, the
12、 crops _ . A. would be savedB. would have been savedC. will be savedD. had been saved ( )13. You _ come earlier. The bus left a moment ago. A. wouldB. should haveC. mayD. have ( )14. He treated me as though/as if _ his own son. A. I am B. I would be C. I wasD. I were ( )15. I _ you some money, but I hadnt any on me then. A. would lend B. would have lentC. could lendD. may have lent ( )16. A few minutes earlier and we _ the rain. A. have caught B. had caughtC. could have caught D. were to catch ( )17. - “Have you ever been to Bei