译林版八年级英语下册U3-Grammarppt课件.ppt
Unit3 Online tours,Grammar,?,Teaching aims,1.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),Tense,Structure,(,结构）,the simple past tense,the 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-task,Find out the tenses mainly used in the passage,Millie,had a,dream,last,night.,She dreamt of,travelling to the USA.,Millie,has been to the USA,once.She went there in,2013.,She had a wonderful,time there.,Her uncle is in,the USA.He has lived there,fore three years.,Differences between the simple past tense and,the present perfect tense(2),Tense,Concept,(,概念,),the simple past,tense,the 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 answers in groups and,give your,reasons,.,Pre-task,Finish some exercises,Differences between the simple past tense and,the present perfect tense(3),Tense,The time expressions(,标志词,),the simple past,tense,the present perfect,tense,yesterday,Last year,in May,in+,过去,某一年，,two days ago,just now,等,already,just,yet,ever,never,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 years,once,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 Beijing for two years.,We use the simple past tense to tell what,happened in the past.,Daniel,went,to 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,happened in the past.,Daniel,bought,a 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,visited,Canada in 2010 and 2011.,We use the 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-task,Task 1:Look and say,key words:,years ago,live,small old houses,key words:,since 1990,move,new flats,key words:,used to,go out,bicycle,key words:,at present,the government,build,railway station,key words:,Jay Chou,is,little boy,10 years ago,key words:,now,grow up,key words:,in the past,the village,poor,dirty,key words:,now,the village,become,rich,clean,1.Finish Part C on Page 41 by yourselves.,2.Check answers in groups.,Ask me for help if you have any questions.,While-task,Task 2:Finish exercises,Post-task,Make a new dialogue,A:,Have,you ever,been,to,?,B:Yes,I,have,.,A:When and where did,?,B:,.,A:How long,did,you stay there,?,B:,.,A:How many times,?,B:,.,A:,is a good place for shopping.What,did,you 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-task,Finish exercises,Write about Millies trip,using the simple past tense,and the present perfect tense.,Millies 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,Writing,Simple past tense,Present perfect tense,构成,时间状语,语境,did,have/has done,yesterday,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,Summary,Homework,1.,Review the usage of the simple past tense,and the,present perfect tense.,2.,Finish writing Millies trip to the USA.,
