牛津译林版八年级下册Grammar图片课件ppt

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一、T understand the differences between the simple past tense and the present perfect tense.二、T grasp the expressins with the present perfect tense.三、T grasp the expressins with the simple past tense.四、T understand different uses f the present perfect tense.
dream vi.&vt. 做梦，梦想dream f/ahut 梦想；想像passprt n. 护照
Have yu ever been t Beijing?
When did yu g there?
Hw many times have yu been t Beijing?
Have yu bught a cmputer?
When and where did yu buy it?
一般过去时和现在完成时
Daniel went t Beijing tw years ag.
We use the simple past tense t tell what happened in the past.
We use the present perfect tense t talk abut an actin that started in the past and cntinues t the present.
Daniel has lived in Beijing fr tw years.
Daniel bught a new cmputer last mnth.
We use the present perfect tense t talk abut the result f an actin. When the actin happened is nt very imprtant. It may have just happened r happened sme time ag.
Daniel has bught a new cmputer. (He has a cmputer nw.)
He visited Canada in 2010 and 2011.
We use the present perfect tense t tell hw many times an actin has happened till nw.
He has been t Canada twice.
现在完成时和一般过去时区别
现在完成时和一般过去时用法不同
现在完成时和一般过去时结构不同
副词作标志词：just, already, yet
since + 时间点/(时间段+ag)/一般过去时句子；fr + 时间段
表示次数的时间状语：nce, twice, three times, ever, never
过去时间点：just nw, at that time, yesterday, this mrning, three years ag等
过去时间段：in the past, in + 过去的年份, last week, nce upn a time等
现在完成时和一般过去时时间状语不同
Different between the tw
I ________ (visit) the Palace Museum with my grandparents the ther day.
I ________ (climb) Munt Huang last summer.
Cmplete the sentences with the crrect frms f the wrds in brackets.
I am happy that I ___________ (learn) t swim.
______ yu ever ______ (try) the famus Tianjin Bazi?
Have tried
have learnt
I ________________ (finish/just) my hmewrk.Millie _______ (finish) her hmewrk 20 minutes ag.
2. I ______ (write) an email t my friend yesterday.Daniel __________________ (write/already) tw emails.
have just finished
has already written
3. I ____ (be) in Hainan last mnth.Sme f ur classmates ____________ (nt be) t Hainan yet.
4. I _________ (live) in Sunshine Twn since I was brn.Daniel ____ (live) in Nanjing in 2007.
have nt been
Millie: ___________________ (yu/be/ever) t Nanjing?Simn: Yes. I(2)____________(be) there three times.Millie: When (3)____________ (yu/g) there last?Simn: Last summer. I (4)______(spend) a week there.Millie: (5)____________ (yu/like) it?Simn: Oh yes. I (6)_____ (have) a great time there. I (7)______ (visit) many places f interest and (8)____ (eat) lts f lcal fd.Millie: Lucky yu! I (9)_______________ (be/never) there.
Have yu ever been
have never been
Cmplete the cnversatin with the crrect frms f the wrds in brackets.
be buy read return see shw
Saturday, 15 MarchHave yu ever dreamt f travelling arund the wrld withut a passprt? Yes, yu can realize yur dream by taking an nline tur. Yesterday Danniel (1)_________ me an nline tur f the USA. I (2)_____ never _____ s many wnderful pictrues befre.
have seen
Cmplete Millie’s diary entry with the crrect frms f the wrds in brackets.
Last week, I (3)_________ a bk abut the places f interest in the USA. I (4)_________ 20 pages already. It’s really interesting. My dad (5)_____ just _________ frm the USA, but I (6) ______ never_______ there. I hpe I can visit the USA sme day.
have been
用法不同：一般过去时表示过去某个时间发生的事、存在的状态或经常发生的动作，和现在不发生关系。现在完成时表示的动作或状态与现在的情况有联系，侧重这一动作对现在所造成的影响。
现在完成时/一般过去时的区别
结构不同：一般过去时：主语 + 谓语动词的过去式现在完成时：主语 + have/has+动词的过去分词 时间状语不同：一般过去时通常与表示过去的具体的时间状语连用。而现在完成时则常与表示不确切的时间副词连用。
1. I _________(live) in this area since I was the past, mst f the peple here　　　　(ride) bikes t wrk. 3. S far, the Smiths 　　 　 　(visit) 30 places f interest in China. 4.Mr Green 　 　　　(nt cme) back frm China yet. 
用所给词的适当形式填空
have visited
1. Recite the new wrds and phrases.2. Revise the difference between the simple past tense and the present perfect tense.