资源简介

(共21张PPT)
Unit 1
Past and Present
译林版把年级下册
Grammar 阅读课
Present perfect tense
The rise of Shenzhen
Learning Aims
Learn the forms of affirmative sentences, negative sentences, and questions of the present perfect tense, as well as the forms of affirmative and negative answers.
01
Understand the rules for the formation of the past participle forms of regular and irregular verbs.
02
Communicate personal experiences and changes by writing sentences or short dialogues using the present perfect tense.
03
What tense does the writer use
How do you know that
Lead-in
Present perfect tense
Work out rules
present
now
主语+have/has助动词 + done(过去分词)+其他
Present perfect tense
现在完成时的基本构成 ：
I/We/You/They + have + done(过去分词）+其它。
He/She/It + has + done(过去分词）+其它。
e.g.
They ______________ their homework. (finish）
He ______________his homework. （finish)
have finished
has finished
Work out rules
现在完成时的一般疑问句
Have you arrived？
Has she arrived？
Have/Has
主语
Have Tom and Jane arrived？
肯定句的主语和have/has调换位置变一般疑问句
过去分词
Yes, I have. / No, I haven’t.
Yes, she has. / No, she hasn’t.
Yes, they have. / No, they have’t.
现在完成时
过去持续到现在的动作或状态
过去的行为对现在产生影响
动作已经发生0-多次
结构:
标志词:
主语+have/has done+其它
already,ever,just,never,recently,yet,before
since,for,in the past years,
over/during the years,
in recent years, so far
Work out rules
When to use
Sentences
现在完成时与for和since的用法
I have been here for 10 days.
I have been here since 10 days ago.
I have been here since I was born.
for+一段时间
since+时间点（年月周日时）
I have been here since January 10th.
since+时间段+ago
since+一般过去时从句
Sentences
现在完成时的肯定句、否定句与一般疑问句
肯定句
否定句
一般疑问句
肯定回答
否定回答
sb have/has done (sth).
sb have/has not done (sth).
Have/Has sb arrived
Yes, sb have/has.
No, sb haven’t/hasn’t .
I have
We have
You have
They have
He/She/It has
have not
has not
=I’ve
=We’ve
=You’ve
=They’ve
=He’s/She’s/It’s
=haven’t
=hasn’t
Present perfect tense
过去分词的构成
finish / repair
change / live
try / study
stop / plan
规则动词+ed
以e结尾的+d
以辅音字母y结尾的-y+ied
以元音+辅音结尾的短动词，双写尾字母+ed
Present perfect tense
过去分词的构成
Present perfect tense
过去分词的构成
A-A-A
A-B-A
A-B-B
A-B-C
hit,put,cut,cost,spread,hurt,set,let
come,become,run
meet,make,catch,keep,win,hold,
tell,spend,have,lead,fight,think,
fall,take,drive,know,see,write,choose
forget,lie,hide,wake,eat,steal,begin
Exercises
has changed
has
turned
has improved
have
moved
built
haven’t visited
Exercises
found
has worked
left
went
has
returned
bought
have visited
Exercises
have lived
have been
have fallen
have been
Have;
noticed
are
enjoy
Discussion
Talk with your partner about the changes in your hometown, using the present perfect tense
roads:
transport:
buildings:
environment:
city:

Discussion
Talk with your partner about the changes in your hometown, using the present perfect tense
A: Hi! Long time no see.I heard you went back to your hometown in Guizhou last month. How was the visit
B: Oh, it's amazing! So many changes have taken place since I left our town five years ago. The old dirt roads have turned into wide streets, and there are even new bus stations. Have you ever seen a village with its own library Ours has one now-we never had that before!
Discussion
Talk with your partner about the changes in your hometown, using the present perfect tense
A: Wow, that's great. My hometown in Sichuan has changed a lot too. We used to live in small wooden houses, but most families have moved into new buildings.
B: Really My grandma says the government has built a new bridge through the mountain. It used to take two hours to go to the town centre, but now it only takes 20 minutes. Many young people have come back to start businesses-like my cousin, who has opened an online fruit shop.
Practice
1. I can’t find my key. I’m afraid I ________ it.
2. I won’t go to the cinema with my friends tomorrow. I ____________ the film many times.
3. Can I borrow your dictionary
Sorry, I ____________ it to Sandy.
4. Let’s go home now. The rain ___________.
5. The bus _________. You’d better wait for another 10 minutes.
have lost
have watched
have lent
has stopped
has left
Homework
1. Remember the grammar rules by heart.
2. Remember the Past participle of irregular verbs
3. Finish the exercise.

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