完成式完成式pptppt课件课件虚拟语气虚拟语气与过去事实相反与过去事实相反If条件句条件句主句主句haddonewouldshouldcouldmighthavedone不定式的完成式与不定式的完成式与happen, appear, seem, pretend1.Heseemstohavebeenateacher.-Itseemsthathewasateacher.Cf.Heseemstobeateacher.(Itseemsthatheisateacher.)2.Hepretendedtohavereadthebook.-Hepretendedthathehadreadthebook.3.Ihappenedtohavedriventhatkindofcarbefore.-IthappenedthatIhaddriventhatkindofcarbefore.withthefollowingverbsinthepassivevoicebelieve,consider,find,know,report,say,suppose,thinkYouaresupposedtohavefinishedyourhomework.SheisknowntohavereceivedtwoNobelprizes.meant,hoped,desired,expected,planned,promised,wished,wantedtohavedonesth.,butIhopedtohaveseenyouoffyesterday,butIdidnthavetime.cf.Ihadmeanttohelpyou,butIwastoobusyatthemoment.Ihadintendedtoseeyouoff,butIhadaveryimportantmeetingtoattend.表示愿望，打算一类的词，如：表示愿望，打算一类的词，如：hope,expect,mean,intend,want,think,suppose等，其过去等，其过去完成时表示过去未曾实现的愿望或意图。完成时表示过去未曾实现的愿望或意图。 Hardly had I got home when the rain poured down. No sooner had I got home than the rain poured down. 我刚到家大雨就倾盆而下。 This is the first time that I have come here. It was the third time that he had made the same mistake. If you had taken my advice, you would not have failed in the exams. It is hard for me to imagine what I would be doing today if I _ in love at the age of seven, with the Melinda Cox Library in my hometown.A.wouldnt have fallenB.had not fallenC.should fallD.were to fallPresent Perfect Continuous Tense has / have been doing- used to talk about an ongoing state or action which began in the past and is still continuing or has just finisheddifference betweenthe present perfect - focuses on the fact that an action is completed and the present perfect continuous - focuses on the fact that it is still ongoing Ive learned how to play chess. ( I can play chess now. )Ive been learning how to play chess. ( Im still learning. )结束语结束语谢谢大家聆听！谢谢大家聆听！16