《Past and Present》GrammarPPT
第一部分內(nèi)容：Learning aims
1. To master the structure and basic usage of present perfect tense(PPT).
（掌握現(xiàn)在完成時的基本結(jié)構(gòu)、用法。）
2. To learn the rules of forming the past participle of verbs.
（學(xué)習(xí)動詞的過去分詞變化規(guī)則。）
3. To learn some time expressions usually used in PPT.
（學(xué)習(xí)常用在現(xiàn)在完成時里的時間表達(dá)方式。）
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《Past and Present》PPT，第二部分內(nèi)容：Lead-in Ask and answer
1. How long has Mr. Chen lived in Sunshine Town?
He has lived here since he was born.
2. Can Mr. Chen see his old friends as often as before?
No. Because most of his old friends have moved away.
present perfect tense
have + done(動詞過去分詞)
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《Past and Present》PPT，第三部分內(nèi)容：While-task
Task1: Learn by yourselves
When do we use present perfect tense?
We use the present perfect tense to talk about an action that started in the past and continues to the present.表示過去開始，現(xiàn)在還在繼續(xù)的動作。
We use the present perfect tense to talk about an action that happened in the past and has a connection with the present.
表示過去發(fā)生的或已完成的動作對現(xiàn)在造成的影響或結(jié)果。
Task2: Group work
Discuss: What's the basic structure of PPT?
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《Past and Present》PPT，第四部分內(nèi)容：Adverbs of time
already: 表示已經(jīng)發(fā)生（肯定）
ever: 表示“曾經(jīng)” （否定句 /疑問句）
for: 表示一段時間
just: 表示“剛剛”
never: 表示“從不” （否定句）
recently: 表示“最近”
since: 表示“自---以后”
yet: 表示“已經(jīng)”或者“還沒有”（疑問句/否定句）
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《Past and Present》PPT，第五部分內(nèi)容：Exercises
1. I ________(have) lunch already.
2. Has the train_______ (arrive), yet?
3.Tome ____ never ______ (be to ) China.
4. The twin ______just _____(see) my father.
5. The twins ____(see) my father just now.
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《Past and Present》PPT，第六部分內(nèi)容：課堂練習(xí)
一、寫出下列詞的過去分詞
1. be_____________2. become___________
3. begin__________ 4. blow_____________
5. build___________6. choose___________
7. cost____________8. do_______________
9. drink___________10. eat______________
11. drive__________12. fall______________
13. fly____________14. forget____________
15. know___________
二、根據(jù)旬意及中文提示完成單詞
1. I have only started to learn French _______（近來）
2. ---Has the train arrived ____________ (還,仍)?
---Yes, it arrived ten minutes ago.
3. How long has Mr Smith____________ (教)English so far?
4. There have been great____________ (改變)in America since I left there.
5. No country has made such progress as Chinese in the ____________（過去的）thirty years.
三、用括號中所給動詞的適當(dāng)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 ____________ (not hear) from my brother for a long time.
5. We ___________ (be) there many times since 3 years ago.
四、單項選擇
( ) 1. I haven’t seen you _____ last Friday
A. for B. since C. from D. on
( ) 2. Oh, you ____ the computer game for two hours. It’s bad for your eyes. Stop, please!
A. played B. have played C. were playing D. play
( ) 3.I won’t go to the show because I ____ my ticket.
A. lose B. don’t loseC. have lostD. will lost
( ) 4. ---______ my dictionary? ---Yes. I saw it on your desk a moment ago.
A. Have you seen B. Do you see
C. Had you seen D. Would you seen
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