8B+Unit+1+Past+and+present+grammar（共26张PPT）.ppt

1、Unit 1 Grammar,现在完成时态,The Present Perfect Tense,We use the simple past tense to talk about what happened at a definite time in the past. Past present Eddie was born four years ago.,We use the present perfect tense to talk about things that started in the past and still have some connection with the

2、present. Eddie has lived with Millie since he was born. Eddie has lived with Millie for four years.,present,Past,Past,present,4 years,present,present,阅读六个句子，讨论并完成问题1. She has helped the children with their lessons for an hour.2. They have learned English for three years.3. I /we have not told it to

3、him. 4. Jim has not seen the film before.5.Has he finished his homework yet? Yes, he has./No, he hasnt. 1.现在完成时结构 肯定：_+_+_ 否定：_ + _+_ 一般疑问句：把_提前 肯定回答 _ / 否定回答_ 2.have not 可缩写成_has not 可缩写成 _,现在完成时的构成,主菜单,上一页,下一页,助动词have (has）+ 过去分词,陈述句肯定形式。主语+ have/has+ 过去分词+其它 e.g. I have had lunch. 已经吃过午饭了。 He has

4、 gone to Beijing. 他去北京了。 陈述句否定形式。主语+ have/has+ not+过去分词+ （在助动词have/has后+not，可缩写为havent/hasnt） e.g. I havent had lunch. 我还没吃午饭 He hasnt gone to Beijing. 他还没有去北京。,上一页,下一页,主菜单, 现在完成时的基本句型,一般疑问句形式及其答语。Have/Has+主语过去分词 （将助动词have/has提前，句末加问号） 肯定回答：Yes , 主语 have/has. 否定回答：No , 主语 havent/hasnt. Has he gone t

5、o Beijing? 他去过北京了吗？ Yes, he has./No, he hasnt. 特殊疑问句形式。（疑问词+一般疑问句） 特词+ have/has+主语过去分词？ e.g. Where has he gone? 他去了哪里？,上一页,下一页,主菜单,move live love like,动词的过去式和过去分词的构成:,visit repair watch finish,visited visited repaired repaired watched watched finished finished,moved moved lived lived loved loved lik

6、ed liked,verbed,以不发音的e 结尾d,一.规则变化,stop mop trap plan,stopped stopped mopped mopped trapped trapped planned planned,注:以一个辅音字母结尾的重读闭音节词,双写最后一个辅音字母ed,双写ed,study hurry,studied studied hurried hurried,去yied,注:以辅音字母加y结尾的词,去yied.,动词的过去式和过去分词的构成:,过去分词的构成,上一页,ABB,AAA,ABC,ABA,二.不规则变化,见课本第122页。,活动一(仿照例句看表格造句）,

7、We,clean the room,clean the window,see a film,cook dinner,They,She,climb the tree,go to Beijing,visit the Great Wall,My father,1. We _ the room but we _ cleaned the window.,2. _ you _ the room? Yes, _ _ you _ the window? No, _,have cleaned,havent cleaned,Have,cleaned,we have,Have,We havent,cleaned,H

8、e,climb the hill,finish her homework,Watch Beijing Opera,活动二 Chat time (Exercise C) M : _ you _ (see)any films recently, Sandy? S : No, I _.What about you? M : I _ (see) one last Saturday. S : Whats it about? M : Its about the changes in Beijing over the past century. From this film,I _(learn) more

9、about Beijings past and present. S: Oh, I think I _ (hear) about the film. Do you plan to see it again? M: Yes, Id like to.,Have,seen,havent,have seen,have learnt,have heard,现在完成时的时间状语,常与不确定的时间状语连用，如:already, never, ever, just, yet, before, so far, in the past few years等,表示“到目前为止”所发生的动作.,上一页,下一页,主菜单

10、,现在完成时的时间副词和时间短语:,1. 副词already和yet。already一般用于肯定句中，yet一般用于否定句和 疑问句中。 如: We have already finished our homework/already. 我们已完成作业了。,They havent finished their homework yet. 他们还没有完成作业。,“already” 用于现在完成时的肯定句中, “yet” 用于现在完成时的否定句和疑问句中. 用“already” “yet”填空 He has ( ) visited many places in China. ( ) 注意 alre

11、ady 在句中的两种位置. The train hasnt arrived .火车（到现在）还没有到。 Has she arrived ? 她已经到了吗？Hasnt he come ? 她还没来吗？,already,already,yet,yet,yet,- I have never been to the Great Wall. 我从未去过长城。,副词ever 和never。多用于否定或疑问 句中，表示“曾经”或“从未“等。 如: - Have you ever been to the Great Wall? 你曾经去过长城吗?,He has been there twice recentl

12、y. 近年来他去过那里两次了。,3. 用表示到说话为止的过去时间状语, 如 : just, before, recently等。 如: I have seen her before, but I can not remember where. 我以前见过她，但记不起在哪里见过。,Conclusion,陈述句,have/has后，句末,疑问句,主语后,陈述句,have/has后,否定陈述句,have/has后,否定陈述句 疑问句,句末,肯/否定陈述句,疑问句,句末,1,2,3,4,5,智力大考验,写出下列动词的过去分词,travel _ visit _ live _ miss _ move _

13、learn _,be _ give _ see _ make _ put _ come _,1.Have you done your homework _? (for, just, yet) 2.I have _ been to Chengdu. (ever, never, yet) 3.He has _ washed the dishes. (already, ever, for) 4.Have you cleaned your room _? (for, just, yet) 5.Have you _ ridden a horse? (ever, for, yet) 6.They have

14、 _ arrived. (ever, just, yet) 7.We have not completed the project _. (already, for, yet),yet,never,already,yet,ever,just,yet,课堂检测,Why do I look so happy?,A guessing game,Have you _?,A guessing game,Why is Yao Ming so tired?,Has he _ ?,句型转换,1.They have finished their homework. (改为一般疑问句，并做肯定回答) 2.Mr.

15、and Mrs. Li have come back.(改为否定句) 3.John has played this computer game a few times.(改为否定句) 4.We have seen that film. (改为一般疑问句，并做否定回答) 5.Mr. Dong has repaired over ten bikes since last Monday. (改为否定句),课堂检测,I _ (do) my homework already. He _(not finished) his homework yet. _you ever _(be) to Beijing? We _ never _ (see) such an exciting match before. Mother _ just _(clean) t