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时间:2020-12-13
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1、thePresentPerfectTense现在完成时助动词have(has)+过去分词donepastnowYesterday,wecleanedtheclassroom.Now,theclassroomiscleanbecausewehavecleanedit.用法1强调过去发生的动作对现在产生的结果或影响1.Myfatherboughtmanybooksformeyesterday.Now,Ihavealottoreadbecause________________________________2.Isawthisfilmlastweek.Now,Iknowthisfilm
2、becauseI_____________________.3.Ididmyhomeworkyesterday.Now,IcangiveittotheteacherbecauseI______________myfatherhasboughtmanybooksforme.haveseenitbeforehavedoneit.“仍然,还”用在疑问句和否定句中,放在句末。Ihaven’treadthisbookyet.Haveyouhadbreakfastyet?already:Yet:“已经”通常用于肯定句中,放在句中。Ihavealreadyreadthisbook.有时,也用在疑
3、问句中表示惊讶。Haveyoueatenupallthefoodalready?“从来不”用在否定句中,放在句中。Ishefamous?Ihaveneverheardofhim.evernever“曾经”通常用于疑问句和肯定句中,放在句中。Ihaveeverseenthisfilm.HaveyoueverbeentotheUSA?“以前”用在完成时中,放在句末。Ihaveneverreadthiskindofbooksbefore.justbefore“刚刚”用在陈述句中,放在句中。Ihavejustboughtanovel。Shebegantoworkin2005.Shestil
4、lworksherenow.Shehasworkedatthisschoolfor7years.nowpastIbegantoteachEnglishatthisschoolfiveyearsago.IhavetaughtEnglishatthisschoolforfiveyears.用法2:过去发生的动作一直延续到现在。1.Iamadoctor.IbegantoworkwhenIwas22.Now,Iam26.I________forfouryears.2.WewenttotheUSAlastMonday.TodayisMonday.We_________(stay)intheU
5、SAsincelastMonday.haveworkedhavestayedsinceandforThewomanhasworkedatthisschoolfor2years.(sincetwoyearsago)since2yearsagosince1998sinceshecametotheschool)for+时间段since+时间点for2years/alongtime一、用for和since填空。______threehours______threeo’clock______twodays______yesterdayafternoon______Icamehere_____
6、_lastSunday_______aweek_______alongtime_______1997______twoweeks_______threeyearsago_______lastmonthforsinceforsincesincesinceforforsinceforsincesince1.They’veknowneachothersince_______.A.1995B.threeyears2.I’vebeeninterestedinChinesefor______.A.lastyearB.oneyear3.Shehasbeenadoctorfor______.A.t
7、woyearsB.twoyearsago4.I’vehadaheadachesince_______.A.IgotupthismorningB.fivehours5.We’vebeenherefor______.A.onehourB.oneo’clockAABAB6.Myparentshaveownedthishousefor______.A.alongtimeB.manyyearsago7.They’vebeeninlovesince______.A.lastspr
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