牛津8BUnit1PastandPresentGrammar(A)课件.ppt

8BUnit 1 Past and PresentGrammar (A)Learning aims 1.To know the present perfect tense. 2.To master the structure of the PPT. 3.To learn the differences between the simple past tense and the present perfect tense. 1 Questions about Reading: (1) How long has Mr. Chen lived in Sunshine Town? (2) When did Mr. Chen get married? (3) There have been many changes in this town. What has the centre of town become?(4) How does Mr. Chen feel from time to time? He has lived in Sunshine Town since he was born.In 1965It has become a new park.He feels a bit lonely.Some more questions: (1) How long have you lived in this town? (2) How long have you studied in this school? (3) How long have you studied English? (4) Where have you been recently?The Present Perfect Tense现在完成时态现在完成时态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 present. Eddie has lived with Millie since he was born. Eddie has lived with Millie for four years. presentPastPastpresent4 years一、现在完成时的构成一、现在完成时的构成1. 现在完成时的肯定句现在完成时的肯定句句型句型 主语（第一、二人称单、复数）主语（第一、二人称单、复数）+have 主语（第三人称复数）主语（第三人称复数） +have +过去分词过去分词 主语（第三人称单数）主语（第三人称单数） +has We have lived in Beijing. He has lived in Beijing. I have finished my homework. 2. 现在完成时的否定句现在完成时的否定句句型句型 主语主语+have/has+not+过去分词过去分词+ E.g. 1) I have not seen the movie yet. 2)He hasnt been to Beijing since then.I / They/ We / You have (not) moved.He / She / It has (not)has not = hasnt have not= havent 动词规则变化 1，大多数动词 +ed finish finished visit repair 2，以e结尾的动词 +d change changed live move 3，以辅音字母+y结尾 -y +ied carry carried try study 4，有些动词 双写最后一个字母+ed stop stopped fit plan不规则过去分词的构成不规则过去分词的构成上一页下一页 Typeoriginal p.t p.pcostcostcostreadreadreadmeetmetmetcatchcaughtcaught rideroderiddenspeakspokespokenkeepkeptkeptdrinkdrankdrunkeatateeatenABBAAA ABCMaking sentencesMr.Wu.Wu asks the students to complete the asks the students to complete the sentences below using the present perfect sentences below using the present perfect tense. Help them complete the sentences.tense. Help them complete the sentences.1.1. They_(finishThey_(finish) their homework.) their homework.2.2. Mr. And Mr. And Mrs.LiMrs.Li _(not come) back yet. _(not come) back yet.3.3. John_ (play) this computer game a few John_ (play) this computer game a few times.times.4.4. We _ (not We _ (not see)thatsee)that film yet film yet5.5. MrMr Dong _ (repair) over ten Dong _ (repair) over ten bicycle since last Monday.bicycle since last Monday.6.6. You _ (not You _ (not visit)mevisit)me for a long for a long time.time.have finishedhavent comehas playedhave not seenHas repairedhave not visitedCheck the answers:3. 现在完成时的一般疑问句现在完成时的一般疑问句句型句型 Have/Has+Have/Has+主语主语+ +过去分词过去分词+ +. .Have you finished the work?Have you finished the work?Has she arrived here?Has she arrived here?4. 4. 现在完成时的特殊疑问句现在完成时的特殊疑问句句型句型 特殊疑问词特殊疑问词+have/has+have/has+主语主语+ +过去分词过去分词+ +. .How many times have you been How many times have you been to the Great Wall?to the Great Wall?Act the dialogue out.用括号中动词的适当形式填空用括号中动词的适当形式填空1. He (wait) for an hour. 2. I (not finish) the work yet.3. you (know) him since then?4. I (hear) from my father recently.5. We (be) there many times in the past 3 years.6. The dog (die) since 3 days ago.7. They (finish)the work so far.8. How long you (stay) at home already?has waitedhavent finishedHaveknownhave heardhave beenhas been deadhave finishedhavestayedPractice:9. I (not read) the book before.10. He just (do) it.11. My sister (walk) to school every day last year.12. We (have) an exam again sometime next week.13. By 2000, we (plant) 2000 trees.14. Lucy (go) to Shanghai. She (leave)this morning. 15. Tom (buy) the bike for 2 years.hasdonewalkedwill havehad plantedhas gonelefthave boughthavent read