八年级英语下册 unit 3 online tours grammar教案 （新版）牛津版 (2)

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1、Unit3OnlinetoursTheFourthPeriodGrammarTeachingaims:1.Tounderstandthedifferencesbetweenthesimplepasttenseandthepresentperfecttense.2.Tograsptheexpressionswiththepresentperfecttense.3.Tograsptheexpressionswiththesimplepasttense.4.Tounderstanddifferentusesofthepresentperfecttense.Teachin

2、gSteps:Step1Revision完成句子。1.北京因万里长城而著名。Beijing_____________theGreatWall.2.这条河是个钓鱼的好地方。Thisriverisa__________________fishing.3.我三天前听说过这件事。I_____________this_______________.4.自从2000年起，他就在上海工作了。He__________inShanghai______2000.Step2PresatationTeachthenewwords.dreamvi.&vt.做梦，梦想dreamabout/o

3、f想象；梦想e.g.Doyouoftendreamatnight?你在夜里经常做梦吗？Isometimesdreamaboutmyparents.我有时梦见我的父母。Idreamofbecomingateacher.我一心想当个教师。Step3GrammarexplanationTranslatesomesentences.Daniel两年前去了北京。(DanielwenttoBeijingtwoyearsago.)Daniel已经在北京居住两年了。(DanielhaslivedinBeijingfortwoyears.)Tellthestudentsthedif

4、ferencebetweenthesimplepasttenseandthepresentperfecttense.Difference:Weusesimplepasttensetotellwhathappenedinthepast.Weusethepresentperfecttensetotalkaboutanactionthatstartedinthepastandcontinuestothepresent.Exercises:1.三年前他养了只猫做宠物。He______acataspetthreeyearsago.2.这只宠物猫他养了三年了。He______

5、___thepetcatforthreeyears.Daniel上个月买了台新电脑。Danielboughtanewcomputerlastmonth.Daniel已经买了台新电脑。Danielhasboughtanewcomputer.(Danielhasanewcomputernow.)Differences:Weusethesimplepasttensetotellwhathappenedinthepast.Weusethepresentperfecttensetotalkabouttheresultofanaction.Whentheactionhappe

6、nedisnotveryimportant.Itmayhavejusthappenedorhappenedsometimeago.Exercises:1.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。I______________thatnewzoo.吴老师2010年和2011年访问过加拿大。MrWuvisitedCanadain2010and2011.吴老师已经去过加拿大两次。MrWuhasbeentoCanadatwice.Differences:Weusethesimplepastten

7、setotellwhathappenedinthepast.Weusethepresentperfecttensetotellhowmanytimesanactionhashappenedtillnow.Exercises:1.我上周看过这部电影。I_____thismovielastweek.2.我已经看过这部电影很多次。I__________thismoviemanytimes.Step4ExercisesA.AmyisshowingMilliesomepictures.Completehersentenceswiththecorrectformsofthew

8、ordsi