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1、I have been to before.I went there last week.Free talkFree talk1.Tounderstandthedifferencesbetweenthesimplepasttenseandthepresentperfecttense.2.Tounderstandtheexpressionswitheachtense.3.Tousethetwotensescorrectly.Daniel两年前去了北京。两年前去了北京。DanielwenttoBeijingtwoyearsago.Daniel已经在北京居住两年了。已经在北京居住两年了。Daniel
2、haslivedinBeijingfortwoyears.We use simple past tense to tell what happened in the past.We use the present perfect tense to talk about an action that started in the past and continues to the present.1.三年前他养了只猫做宠物。三年前他养了只猫做宠物。He_acataspetthreeyearsago.2.这只宠物猫他养了三年了。这只宠物猫他养了三年了。He_thepetcatforthreeyea
3、rs.kepthas keptDaniel上个月买了台新电脑。上个月买了台新电脑。Danielboughtanewcomputerlastmonth.Daniel已经买了台新电脑。已经买了台新电脑。Danielhasboughtanewcomputer.(Danielhasanewcomputernow.)We use the simple past tense to tell what happened in the past.We use the present perfect tense to talk about the result of an action.1.我上个星期去参观了那
4、个新动物园。我上个星期去参观了那个新动物园。I_thatnewzoolastweek.2.我已经参观过那个新动物园了。我已经参观过那个新动物园了。I_thatnewzoo.visitedhave visited吴老师吴老师2010年和年和2011年访问过加拿大。年访问过加拿大。MrWuvisitedCanadain2010and2011.吴老师已经去过加拿大两次。吴老师已经去过加拿大两次。MrWuhasbeentoCanadatwice.We use the simple past tense to tell what happened in the past.We use the prese
5、nt perfect tense to tell how many times an action has happened till now.1.我上周看过这部电影。我上周看过这部电影。I_thismovielastweek.2.我已经看过这部电影很多次。我已经看过这部电影很多次。I_thismoviemanytimes.sawhave seenSimon is showing Millie some pictures.Complete his sentences with the correct forms of the words in brackets.I_(visit)thePala
6、ceMuseumwithmygrandparentstheotherday.I_(climb)MountHuanglastSummer.visitedclimbed独立思考，两人核对独立思考，两人核对_youever_(try)thefamousTianjinBaozi?IamhappythatI_(learn)toswim.Have tried have learntMr Wu is asking the students to make sentences with the correct tenses.Help them complete the sentences with the c
7、orrect forms of the words in brackets.1.I_(finish/just)myhomework.Millie_(finish)herhomework20minutesago.2.I_(write)anemailtomyfriendyesterday.Daniel_(write/already)twoemails.has already writtenhave just finishedwrotefinished独立思考，四人小组核对，独立思考，四人小组核对，轮流汇报轮流汇报3.I_(be)inHainanlastweek.Someofourclassmate
8、s_(notbe)toHainanyet.4.I_(live)inSunshineTownsinceIwasborn.Daniel_(live)inNanjingin2007.waslivedhave livedhaven not beenMillie has never been to Nanjing.She is asking Simon about the city.Complete their conversation with the correct forms of the words in brackets.Millie:_(you/be/ever)toNanjing?Simon
9、:Yes.I(2)_(be)therethreetimes.Millie:When(3)_(you/go)therelast?Simon:Lastsummer.I(4)_(spend)aweekthere.Millie:(5)_(you/like)it?Have you ever beenhave beendid you gospentDo you like独立思考，两人核对，汇报独立思考，两人核对，汇报Simon:Ohyes.I(6)_(have)agreattimethere.I(7)_(visit)manyplacesofinterestand(8)_(eat)lotsoflocalfo
10、od.Millie:Luckyyou!I(9)_(be/never)there.hadvisitedatehave never beenMillie is writing about the USA in her diary.Complete her diary entry with the correct forms of the verbs in the box.bebuyreadreturnseeshowSaturday,15MarchHaveyoueverdreamtoftravellingaroundtheworldwithoutapassport?Yes,youcanrealize
11、yourdreambytakinganonlinetour.YesterdayDanniel(1)_meanonlinetouroftheUSA.I(2)_never_somanywonderfulpicturesbefore.showedhave seen独立思考，四人小组核对，轮流汇报独立思考，四人小组核对，轮流汇报Lastweek,I(3)_abookabouttheplacesofinterestintheUSA.I(4)_20pagesalready.Itsreallyinteresting.Mydad(5)_just_fromtheUSA,butI(6)_never_there.I
12、hopeIcanvisittheUSAsomeday.bebuyreadreturnseeshowhave beenboughthave readhasreturnedWeoftenusethesetimeexpressionswiththesimplepasttense:yesterdaytheotherdaylast.agoWeoftenusethesetimeexpressionswiththepresentperfecttense:alreadyuptonoweveruntil/tillnowjustsofarrecently(not)yet1)一般过去时一般过去时表示过去某时发生的动
13、作或表示过去某时发生的动作或单纯叙述过去的事情，单纯叙述过去的事情，强调动作强调动作；现在现在完成时完成时为过去发生的，强调过去的事情为过去发生的，强调过去的事情对现在的影响，对现在的影响，强调的是影响强调的是影响。2)一般过去时常与具体的时间状语连用一般过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语而现在完成时通常与模糊的时间状语连用，或无时间状语连用，或无时间状语。一般过去时的时间状语一般过去时的时间状语：yesterday,lastweek,ago,in1980,inOctober,justnow等，皆为具体的时间状语。等，皆为具体的时间状语。现在完成时的时间状语现在完成
14、时的时间状语：for,since,sofar,ever,never,just,yet,till/until,uptonow,inthepastyears等，皆不确定的时等，皆不确定的时间状语。间状语。3)现在完成时现在完成时可表示持续到现在的动作或可表示持续到现在的动作或状态，状态，动词一般是延续性的动词一般是延续性的，如：，如：live,teach,learn,work,study,know。一般过去时一般过去时常用的常用的非持续性动词非持续性动词有有come,go,leave,start,die,finish,become,getmarried等。等。句子中如有过去时的时间副词句子中如有过
15、去时的时间副词（如（如yesterday,lastweek,in1960）时，）时，不能使用现在完成时，要用过去时不能使用现在完成时，要用过去时。（错）（错）Tomhaswrittenalettertohisparentslastnight.（对）（对）Tomwrotealettertohisparentslastnight.Tips:1.Mother_meanewcoatyesterday.I_iton.Itfitsmewell.A.hadmadehavetriedB.madehavetriedC.hasmadetriedD.madetried B2.We_treeslastSunday.Sofarwe_over3,000treesthere.A.planted；plantedB.planted；haveplantedC.haveplanted；plantedD.haveplanted；haveplantedB3.I_theway.I_hereformanyyears.A.knewhavelivedB.knewliveC.knowhavelivedD.knowliveC Finish off the exercises in workbook.