八年级下册Unit 1 Past and PresentGrammar优秀ppt课件

这是一份八年级下册Unit 1 Past and PresentGrammar优秀ppt课件，共18页。PPT课件主要包含了+ done ，主语 等内容，欢迎下载使用。
A daily reprt
S, she has learned English fr tw years.
Her name is Wu. She’s 4.
She started t learn English when she was 2.
1.过去发生的动作持续到了现在，可能继续发展下去。
2.过去发生的动作对现在造成了影响或结果。
Wu：Let’s g t watch this film.Ma: Srry, I watched the film in the class. I have watched it already.
3. We use the present perfect tense t talk abut hw many times an actn has happened till nw. 表示到目前为止一个动作发生（重复）的次数。
Bill visited Australia in 2002 and 2020.Bill has been t Australia twice.
Bill visited Australia in 2002 and 2022. Bill has been t Australia twice. It is the first time that I have been here. I have already read this bk many times.
1.She's cme first three times.
2.There have been many buildings in my twn.
3.I can’t get in the huse. I’ve lst my keys.
4.She has lived in Liverpl all her life.
5.Hw clean! Wh has cleaned the rm?
6.We have seen the film twice.
Grup the fllwing sentences accrding t the usages.
Usage 1
Structure f the present perfect tense
have/has
◆ Present perfect tense—Negative frms
haven’t/have nt hasn’t/has nt
◆ Present perfect tense—Yes/N questins
+ dne ... ?
Yes, sb has/have.N, sb has/haven’t.
现在完成时表示过去发生或已经完成的某一动作对现在造成的影响或结果。(汉语中常用“已经”、“过”、“了”等表达) 通常与表示包括现在在内的时间副词just(句中）, already(句中，句末）, befre(句末）, yet（句末）, never（句中）, ever（句中）,recently(句末)等状语连用。例如：
1.Eddie has just eaten my fd. (Eddie已经吃了我的食物。）2.I have never heard f that befre.（我以前从未听说过那件事） 3. Have yu ever ridden a hrse?（你曾经骑过马吗？） 4.She has already finished the wrk.（她早已经完成这个工作了。）5.We haven’t finished ur hmewrk yet. (我们还没有完成作业呢。)
Nthing great was ever achieved withut enthusiasm
过去分词的规则变化(同过去式的规则变化)
课本P122 不规则动词的变形把原形、过去式、过去分词一起记忆
1. brrw _______ 2. hpe ______3. make ______ 4. get _______5. plan ________ 6. cry ____7. send _____ 8. watch _______9. say ______ 10. grw ______11. hit _____ 12. enjy _______
Mr. Wu wants the students t practise using the present perfect tense. Help them write the past participles f the verbs belw. (P 14)
1. They _____________ (finish) their hmewrk already.2. Jhn ____ never ______ (visit) China.3. Mr. Li ____________ (repair) ver ten bicycles since Mnday. 4. We ____________ (nt see) each ther fr years.
have finished
has visited
has repaired
haven’t seen
5. My parents _____________ (nt cme) back yet.6. Our teacher __________ (teach) us a lt abut the histry f China.
haven’t cme
B. Cmplete the sentences belw using the present perfect tense.
C. Cmplete the cnversatin. Use the crrect frm f the verbs in brackets.
Millie: ______ yu _____ (see) any films recently, Sandy?Sandy: N, I haven’t. What abut yu?Millie: I _____ (see) ne last Saturday. Sandy: What’s it abut?Millie: It’s abut the changes in Beijing ver the past century. Frm this film, I ____________ (learn) mre abut Beijing’s past and present.Sandy: Oh, I think I __________ (hear) abut the film. D yu plan t see it again?Millie: Yes, I’d like t.
Have seen
have learnt
一、用括号中所给动词的适当形式填空1. He ___________ (wait) fr an hur.2. I _______________ (nt finish) the wrk yet.3. _____ yu _______ (knw) him since then?4. I ____________ (nt hear) frm my brther fr a lng time.5. We ___________ (be) there many times since 3 years ag.
haven't finished
Have knwn
haven't heard
1.我们已完成作业了。
2.陈女士还没有回家。
3.我刚听说了这个消息。
4.他三岁的时候就学英语了。
5.这部电影她看了三遍了。
6.你给你朋友买过生日礼物 吗？
1. We have already finished ur hmewrk.2. Miss Chen hasn't gt hme yet.3. I have just heard abut the news.4. He has learned English since he was 3 years ld.5. She has watched the mvie three times.6. Have yu ever bught a birthday present fr yuf friend?