1、Unit3 Online toursGrammar?Teaching aims1.tell the differences between the simple past tense and the present perfect tense.2.be able to make up some sentences using the simple past tense and the present perfect tense.Differences between the simple past tense and the present perfect tense(1)TenseStruc
2、ture(结构）the simple past tensethe present perfect tense主语+动词过去式+其他主语+have/has+动词过去分词+其他Pre-taskFind out the tenses mainly used in the passageMillie had a dream last night.She dreamt of travelling to the USA.Millie has been to the USAonce.She went there in 2013.She had a wonderful time there.Her uncle
3、 is in the USA.He has lived there fore three years.Differences between the simple past tense and the present perfect tense(2)TenseConcept(概念)the simple past tensethe present perfect tense表示过去某时发生的动作，和现在（有/没有）关系。表示过去发生的某一动作,强调和现在（有/没有）关系。没有有1.Finish Part A&Part B on Page 41 by yourselves.2.Check answ
4、ers in groups and give your reasons.Pre-taskFinish some exercisesDifferences between the simple past tense and the present perfect tense(3)TenseThe time expressions(标志词)the simple past tensethe present perfect tenseyesterday,Last year,in May,in+过去某一年，two days ago,just now等already,just,yet,ever,never
5、,recently,before,for+一段时间,since+过去的时间点,these years,so far,up to/till now,in/during/over the past/last few/three yearsonce,twice,several times等according to the context(语境)We use the present perfect tense to talk about an action that started in the past and continues to the present.Daniel has lived in
6、 Beijing for two years.We use the simple past tense to tell what happened in the past.Daniel wentto Beijing two years ago.Differences between the simple past tense and the present perfect tense.Daniel has bought a new computer.(Daniel has a new computer now.)We use the simple past tense to tell what
7、 happened in the past.Daniel boughta new computer last month.We use the present perfect tense to talk about the result of an action.When the action happened is not very important.It might happen just now or some time ago.Mr Wu has been to Canada twice.Mr Wu visitedCanada in 2010 and 2011.We use the
8、simple past tense to tell what happened in the past.We use the present perfect tense to tell how many times an action happened till now.Look at the pictures and complete the sentences with the key words.If your answers are correct,you can get stars.While-taskTask 1:Look and saykey words:years ago,li
9、ve,small old houseskey words:since 1990,move,new flatskey words:used to,go out,bicycle key words:at present,the government,build,railway stationkey words:Jay Chou,is,little boy 10 years agokey words:now,grow upkey words:in the past,the village,poor,dirtykey words:now,the village,become,rich,clean1.F
10、inish Part C on Page 41 by yourselves.2.Check answers in groups.Ask me for help if you have any questions.While-taskTask 2:Finish exercisesPost-taskMake a new dialogueA:Haveyou ever been to?B:Yes,I have.A:When and where did?B:.A:How long didyou stay there?B:.A:How many times?B:.A:is a good place for
11、 shopping.What didyou buy there?B:I.A:What do you think of?B:I think they are.1.Finish Part D on Page 41 by yourselves.2.Check answers in groups.Ask me for help if you have any questions.Post-taskFinish exercisesWrite about Millies trip,using the simple past tense and the present perfect tense.Milli
12、es trip to the USA 时间去年寒假，在美国待了一周游玩伙伴父母游玩地点1.自由女神像（The Statue of Liberty），美国的象征之一2.白宫，非常宏伟的建筑3.百老汇，自20世纪早期以来就已经很有名了，欣赏了音乐剧感受虽然只去过一次，但是 WritingSimple past tensePresent perfect tense构成时间状语语境didhave/has doneyesterday,in 1980,last week,ago,just now,the other day等for,since,ever,never,just,yet,recently,before,次数,in the past years,over the years,so far等表示过去某时发生的动作或单纯叙述过去的事情，强调动作持续到现在的动作或状态；强调过去的事情对现在的影响;到目前为止，动作发生的次数SummaryHomework1.Review the usage of the simple past tense and the present perfect tense.2.Finish writing Millies trip to the USA.
