1. 8B Unit 1 Past and Present
Grammar (A)

2. 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.

3. 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 1965
It has become a park.
He feels a bit lonely.

4. 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) What have studied these days?
(5) Where have you been recently?

5. The Present Perfect Tense
现在完成时态

6. 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.

7. Eddie has lived with Millie since he was born.
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.
present
Past
present
Past
4 years

8. 一、现在完成时的构成 1. 现在完成时的肯定句 句型 主语（第一、二人称单、复数）+have 主语（第三人称复数） +have
一、现在完成时的构成 1. 现在完成时的肯定句 句型 主语（第一、二人称单、复数）+have 主语（第三人称复数） have +过去分词 主语（第三人称单数） has
We have lived in Beijing.
He has lived in Beijing.
I have finished my homework.

9. 2. 现在完成时的否定句 句型 主语+have/has+not+过去分词+……
2. 现在完成时的否定句
句型 主语+have/has+not+过去分词+……
E.g. 1) I have not seen the movie yet.
2)He hasn’t been to Beijing since then.

10. has not = hasn’t have not= haven’t
I / They/ We / You
have (not)
moved.
He / She / It
has (not)
has not = hasn’t have not= haven’t

11. 过去分词的构成 AAA ABB Type original p.t p.p cost read meet met catch caught
ride
rode
ridden
speak
spoke
spoken
keep
kept
drink
drank
drunk
eat
ate
eaten
AAA
ABB
ABC
上一页
下一页

12. Some more examples: most verbs Irregular verbs Infinitive
Past particle
visit
visited
come
live
lived
see
seen
repair
repaired be
been
finish
finished
give
given
move
moved
write
written
watch
watched
make
made
travel
travelled
put

13. Making sentences Check the answers:
Mr.Wu asks the students to complete the
sentences below using the present perfect
tense. Help them complete the sentences.
They___________(finish) their homework.
Mr. And Mrs.Li _____________(not come) back yet.
John___________ (play) this computer game a few times.
We _______________ (not see)that film yet
Mr Dong _______________ (repair) over ten bicycle since last Monday.
You _________________ (not visit)me for a long time.
have finished
haven’t come
has played
have not seen
have not repaired
have not visited

14. 句型 Have/Has+主语+过去分词+…. Have you finished the work?
3. 现在完成时的一般疑问句
句型 Have/Has+主语+过去分词+….
Have you finished the work?
Has she arrived here?
4. 现在完成时的特殊疑问句
句型 特殊疑问词+have/has+主语+过去分词+…….
How many times have you been to the Great Wall?

15. Chat time M : ______ you ____ (see)any exhibition recently, Sandy?
Millie and Sandy are talking about an exhibition of
the history of Beijing. Complete their
conversation. Use the correct forms of the verbs
in the brackets.
M : ______ you ____ (see)any exhibition recently, Sandy?
S : No, I _______.What about you?
M : Yes, I _____________ (see) one. I saw it at the history museum last week.
S : What is it about?
M : I ______________ (forget) the title.It’s about changes in Beijing over the past century.
seen
Have
haven’t
have seen
have forgotten

16. have heard
S: Oh, yes. I ____________ (hear) about it._______ your cousin ____ (go) with you?
M : No, he _______.He ________ (be) very busy this week.
S : Did you enjoy the exhibition?
M : Yes, I did.I ___________ (learn)a lot about Beijing’s past and present. It’s a good exhibition and I _____________ (decide) to see it again. Do you want to go with me?
S : Sure. I won’t miss it this time. go
Did
didn’t
has been
learnt
have decide

17. Act the dialogue out.

18. Practice: has waited haven’t finished Have known have heard have been
用括号中动词的适当形式填空
He (wait) for an hour.
I (not finish) the work yet.
you (know) him since then?
I (hear) from my father recently.
We (be) there many times in the past 3 years.
The dog (die) since 3 days ago.
They (finish)the work so far.
How long you (stay) at home already?
has waited
haven’t finished
Have
known
have heard
have been
has been dead
have finished
have
stayed

19. haven’t read has done walked will have had planted has gone left
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.
has
done
walked
will have
had planted
has gone
left
have bought

20. Homework
复习本课所学内容
完成导学案中练习
预习Part B

21. 中国英语教师网