Unit 1 Past and present
1.在过去 3.自从上学期以来 5.北京的变化 7.在……北部 9.一个很严重的问题 11.像以前一样经常 13. 采取行动干…… 15.感到有点寂寞 17.有美丽的现代化的城镇 2.在现在 4.在不同时代的交通工具 6.在市中心 （2） 8.变为 10.在某些方面 12.不时（3） 14.结婚 16. 把废物倒入水里. 18. 像以前一样经常看见彼此
1.知识目标： 学习词汇：yet, recently, past 学习词组：over the past century, learn more about
2. 技能目标： 1)掌握现在完成时的基本结构、基本用法和 动词过去分词变化规律。 2)能够在语境中正确运用现在完成时。 3)理解并运用常和现在完成时连用的时间表 达方式。 3. 情感目标：用现在完成时谈论家乡的变化。
Present perfect tense
The Present Perfect Tense (现在完成时）
Eddie was born four years ago.
Eddie has lived with Millie since he was born. Eddie has lived with Millie for four years.
+ have +过去分词
e.g. I have finished my report. We have lived in Nanjing for 10
主语（第三人称复数） +have + 过去分词
e.g. They have moved away.
e.g. He has been in Beijing for two
2. 现在完成时的否定句 句型主语+have/has+ not+过去分词 e.g. I have not seen Harry Potter yet. He hasn’t been to Tianjin since then.
句型 Have/Has+主语+过去分词 Have you….? Yes, I have. No, I haven’t. Has he….? Yes, he has. No, he hasn’t.
三、现在分词的构成 A 规则动词的过去分词 原形 过去分词 原形 过去分词 visited travel travelled visit move moved stay stayed stop finish
stopped finished shopped solved
B 不规则动词的过去分词 原形 过去分词 原形 think thought catch put cost 过去分词 put cost grown hurt
原形 feel fall
原形 bring wear
Complete the sentences using the present perfect tense.
1. They have ____________(finish) their finished homework already. visited 2. John ________ never __________(visit) has China. has repaired 3. Mr Li ________________ (repair) over ten bicycles since Monday.
haven’t seen 4. We ____________(not see) each other for years . haven’t come 5. My parents __________________
(not come) back yet. Has taught 6. Our teacher _____________(teach) us a
lot about the history of China.
Complete the conversation using the
correct forms of the verbs in brackets.
Millie: (1)_____ any Have you ____(see) seen
films recently, Sandy?
Sandy: No, I (2)_______. haven’t What about you? Millie: I (3)________(see) one last Saturday. saw Sandy: What’s it about?
Millie: It’s about changes in Beijing
over the past century. From this have learnt (learn) film, I (4)______________ more about Beijing’s past and
present. have heard Sandy: Oh, I think I (5)__________(hear) about the film. Do you plan to see it again? Millie: Yes, I’d like to.
Pay attention to:
一、现在完成时谓语动词的构成： 助动词have/has (not) +V-ed（过去分词） 二、与现在完成时一起出现的时间状语： already ever for just yet never since recently so far before (in/during/over the past ten years
hasn’t finished (not finish) the 1. He ______________
homework yet. He will try to finish it
quickly. 2. My family ________ has lived (live) in Nanjing since 1996. 3. _____ ______ (know) him since Have you known then?
4. They _____ have already _______ decided (decide)
to go to Kunming for the holiday.
5. We ___________ have moved (move) to the new flat since last month. 6. The girl __________ has learned (learn) English for about two years.
7. My father went to Beijing two weeks haven’t seen (not see) him since ago. I____________ then. 8. ____ Has Tom _______ written (write) letters to you recently? 9. Jack’s mother isn’t at home. She ________ has gone (go) to the supermarket.
10. The film ________ has been (be) on for about
20 minutes. We missed the beginning.
Preview integrated skills.