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初中英语牛津译林版八年级下册Unit 3 Online toursGrammar评课课件ppt
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这是一份初中英语牛津译林版八年级下册Unit 3 Online toursGrammar评课课件ppt，共22页。PPT课件主要包含了Tips，planted，happened，has worked，went，has taught，同义句转换等内容，欢迎下载使用。
We've knwn each ther since we were nine r ten. Tgether we've climbed hills and trees. We had jy we had fun. We had seasns in the sun.
simple past tense
present perfect tense
Tell the differences
simple past tense (一般过去时)
We use the simple past tense t talk abut what happened in the past.
√ 一般过去时态表示过去某个时间发生的动作或存在的状态，常和表示过去的时间状语连用；eg: We visited anther famus theme park n the third day. The fd in Hngkng was really nice. √ 也表示过去经常或反复发生的动作。(used t )
present perfect tense (现在完成时)
Ⅰ. We use the present perfect tense t talk abut an actin that started in the past and cntinues t the present.
现在完成时态表示过去已经开始，持续到现在的动作或状态。eg: Daniel has lived in Beijing fr tw years. He has been a vlunteer fr ver tw mnths.
Ⅱ. 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.
现在完成时态表示过去发生或已完成的动作对现在造成的影响和结果。 eg: Daniel has bught a new cmputer. (Daniel has a new cmputer nw.)
Ⅲ. We use the present perfect tense t tell hw many times an actin has happened till nw.
现在完成时态表示一个动作至今为止已经发生了几次。 eg: Mr. Wu has been t Canada twice. Hw many times have yu been t Shanghai?
Differences between the simple past tense and the present perfect tense(Ⅰ)
Differences between the simple past tense and the present perfect tense(Ⅱ)
Structure（结构）
主语 + 动词过去式 + 其他
主语 + have / has + 动词过去分词 + 其他
I ________(visit) the Palace Museum with my grandparents the ther day.
Simn is shwing Millie sme pictures. Cmplete his sentences with the crrect frms f the wrds in brackets.
2. I _________ (climb) Munt Huang last summer.
3. ______ yu ever _______ (try) the famus Tianjin Bazi?
4. I am happy that I __________ (learn) t swim.
have learnt / learned
1. 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.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.
Mr. Wu is asking the students t make sentences with the crrect tenses. Help them cmplete the sentences with the crrect frms f the wrds in brackets.
have just finished
has already written
have nt been
Differences between the simple past tense and the present perfect tense(Ⅲ)
Time expressins（时间表达）
yesterday, yesterday evening(last night), this mrning,the day befre yesterday, last year/ mnth/week, the ther day, in the past,, just nw, in 2019...
already, even,never, just, recently, yet, nce/twice/many times, s far, up t nw/ till/ until nw, ver the years(在这些年),all ne's life(某人一生)， ver/ in/ during the last/ (在过去的...年中...)
* already 已经，用于肯定句句中或句末。 eg: The dctr has already finished his wrk. He has met his relatives already.
* just 刚刚，用于肯定句句中。 eg: Mr. White has just mved t this blck.
* recently 最近，肯定、否定和疑问句中都能用。 eg: Sme students have bught an ipad recently . Has Simn met his friends recently ?
* never 从不，用于否定句中。 eg: He has never seen such a tall building .
* ever 曾经，多用于疑问句中。 eg: Have yu ever travelled by ship?
* yet 还，仍，用于疑问句和否定句中。 nt yet eg: Have yu taught him hw t fly a kite yet?
用所给动词的适当形式填空。
1. We _______ (plant) trees last mnth. S far we ____________ (plant) ver 300 trees there. 2. A terrible earthquake ___________(happen) in Wenchuan n May 12, 2008.3. He ___________ (wrk) here since last year.4. --_____ yu _____ (is) t the United States? --Nt yet. But I _____ (g) t Canada a few years ag.5. He __________ (teach) in ur schl fr 30 years.
have planted
Have been
1.My father came back frm the bkshp just nw. My father ____ just ________ ______ the began t learn Chinese in 2018. He ____ _______ Chinese since film began tw minutes ag. The film _____ ______ ______ since tw minutes has had the mtrbike fr tw years. He ________ the mtrbike tw years ______. = Tw years ____ ______ since he _______the mtrbike. = It’s tw years ______he ________ the mtrbike.
has been n
has passed
单纯表示一段时间或强调一段时间时，虽然有since引导的从句，主句也不必用完成时态。
类似特殊句型有： This is the ... that +句子 This is the best film that I have seen. It is the first/ secnd time that +句子 It is the first time that I have visited the city.
1. Be able t understand the difference between the simple past tense and present perfect tense. (了解一般过去时和现在完成时的区别。）2. Be able t understand different uses f the present perfect tense. (了解现在完成时态的三种不同用法。）3. Be able t understand and use the time expressins with the simple past tense and present perfect tense. （理解并运用常和一般过去时和现在完成时连用的时间状语。）4. Be able t use the tw tenses crrectly t talk abut smething in situatins. （在情景中正确使用两种时态去讨论事情。）
Self- assessment(自我评价)
I have learnt: Result
We've knwn each ther since we were nine r ten. Tgether we've climbed hills and trees. We had jy we had fun. We had seasns in the sun.
simple past tense
present perfect tense
Tell the differences
simple past tense (一般过去时)
We use the simple past tense t talk abut what happened in the past.
√ 一般过去时态表示过去某个时间发生的动作或存在的状态，常和表示过去的时间状语连用；eg: We visited anther famus theme park n the third day. The fd in Hngkng was really nice. √ 也表示过去经常或反复发生的动作。(used t )
present perfect tense (现在完成时)
Ⅰ. We use the present perfect tense t talk abut an actin that started in the past and cntinues t the present.
现在完成时态表示过去已经开始，持续到现在的动作或状态。eg: Daniel has lived in Beijing fr tw years. He has been a vlunteer fr ver tw mnths.
Ⅱ. 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.
现在完成时态表示过去发生或已完成的动作对现在造成的影响和结果。 eg: Daniel has bught a new cmputer. (Daniel has a new cmputer nw.)
Ⅲ. We use the present perfect tense t tell hw many times an actin has happened till nw.
现在完成时态表示一个动作至今为止已经发生了几次。 eg: Mr. Wu has been t Canada twice. Hw many times have yu been t Shanghai?
Differences between the simple past tense and the present perfect tense(Ⅰ)
Differences between the simple past tense and the present perfect tense(Ⅱ)
Structure（结构）
主语 + 动词过去式 + 其他
主语 + have / has + 动词过去分词 + 其他
I ________(visit) the Palace Museum with my grandparents the ther day.
Simn is shwing Millie sme pictures. Cmplete his sentences with the crrect frms f the wrds in brackets.
2. I _________ (climb) Munt Huang last summer.
3. ______ yu ever _______ (try) the famus Tianjin Bazi?
4. I am happy that I __________ (learn) t swim.
have learnt / learned
1. 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.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.
Mr. Wu is asking the students t make sentences with the crrect tenses. Help them cmplete the sentences with the crrect frms f the wrds in brackets.
have just finished
has already written
have nt been
Differences between the simple past tense and the present perfect tense(Ⅲ)
Time expressins（时间表达）
yesterday, yesterday evening(last night), this mrning,the day befre yesterday, last year/ mnth/week, the ther day, in the past,, just nw, in 2019...
already, even,never, just, recently, yet, nce/twice/many times, s far, up t nw/ till/ until nw, ver the years(在这些年),all ne's life(某人一生)， ver/ in/ during the last/ (在过去的...年中...)
* already 已经，用于肯定句句中或句末。 eg: The dctr has already finished his wrk. He has met his relatives already.
* just 刚刚，用于肯定句句中。 eg: Mr. White has just mved t this blck.
* recently 最近，肯定、否定和疑问句中都能用。 eg: Sme students have bught an ipad recently . Has Simn met his friends recently ?
* never 从不，用于否定句中。 eg: He has never seen such a tall building .
* ever 曾经，多用于疑问句中。 eg: Have yu ever travelled by ship?
* yet 还，仍，用于疑问句和否定句中。 nt yet eg: Have yu taught him hw t fly a kite yet?
用所给动词的适当形式填空。
1. We _______ (plant) trees last mnth. S far we ____________ (plant) ver 300 trees there. 2. A terrible earthquake ___________(happen) in Wenchuan n May 12, 2008.3. He ___________ (wrk) here since last year.4. --_____ yu _____ (is) t the United States? --Nt yet. But I _____ (g) t Canada a few years ag.5. He __________ (teach) in ur schl fr 30 years.
have planted
Have been
1.My father came back frm the bkshp just nw. My father ____ just ________ ______ the began t learn Chinese in 2018. He ____ _______ Chinese since film began tw minutes ag. The film _____ ______ ______ since tw minutes has had the mtrbike fr tw years. He ________ the mtrbike tw years ______. = Tw years ____ ______ since he _______the mtrbike. = It’s tw years ______he ________ the mtrbike.
has been n
has passed
单纯表示一段时间或强调一段时间时，虽然有since引导的从句，主句也不必用完成时态。
类似特殊句型有： This is the ... that +句子 This is the best film that I have seen. It is the first/ secnd time that +句子 It is the first time that I have visited the city.
1. Be able t understand the difference between the simple past tense and present perfect tense. (了解一般过去时和现在完成时的区别。）2. Be able t understand different uses f the present perfect tense. (了解现在完成时态的三种不同用法。）3. Be able t understand and use the time expressins with the simple past tense and present perfect tense. （理解并运用常和一般过去时和现在完成时连用的时间状语。）4. Be able t use the tw tenses crrectly t talk abut smething in situatins. （在情景中正确使用两种时态去讨论事情。）
Self- assessment(自我评价)
I have learnt: Result
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