Unit 1 Past and Present Revision(Grammar)（共有PPT29张）

(共29张PPT)
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8B Unit1 Past and present
Revision(Grammar)
S
W
O
T
1.构成
3.用法
2.过去分词的变化
4.时间状语
Present perfect tense
现在完成时
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It has become a modern city.
The government has built some new roads and subways.
Most people have moved into new flats.
The environment has become better and better.
What changes have taken place in Suzhou
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I/We/You/They + have + p.p+其它。
He/She/It + has + p.p+其它。
疑问句：
肯定句：
否定句：
---Have + I/you/we/they +p.p+其它？
---Yes, I/you/we/they have.
---No, I/you/we/they haven’t. /No, not yet.
---Has +she/he/it+p.p+其它？
---Yes, she/he/it has.
---No, she/he/it hasn’t./No, not yet.
I/We/You/They + have + not +p.p+其它。
He/She/It + has + not +p.p+其它。
一、现在完成时的构成
p.p:past participle(过去分词）
Hometown Feelings
Zhong Wei has lived in Wenzhou for the last 13 years. With a hard job
in a crayon factory, he doesn't find much time to visit his hometown. "I
used to return home at least once a year, but I haven't been back for almost
three years now. It's a shame, but I just don't have the time," he says.
Many people like Zhong Wei show great interest in how their hometowns have changed. Perhaps large hospitals and new roads have appeared(出现). In many places, the government has also built new schools and sent teachers from the cities to help.
"Children have learned to read and count at my old primary school since the mid-20th century. But now the buildings are really old. I hear they're going to build a new school there." Zhong Wei thinks such developments are good, and he also knows that his hometown cannot always stay the same.
According to Zhong Wei, however, some things will never change. “Our hometown has left many soft and sweet memories in our hearts.”he says.
Practice
1.Zhong Wei has lived in Wenzhou for the last 13 years.
Has Zhong Wei lived in Wenzhou for the last 13 years
2.Large hospitals and new roads have appeared.
Have large hospitals and new roads appeared
3.The government has also built new schools and sent teachers from the cities to help.
Has the government also built new schools and sent teachers from the cities to help
Practice
1.Children have learned to read and count at my old primary school since the mid-20th century.
Children haven’t learned to read and count at my old primary school since the mid-20th century.
2.Our hometown has left many soft and sweet memories in our hearts.
Our hometown hasn’t left many soft and sweet memories in our hearts.
Practice
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1. 规则动词
动词特征 变化 例词
一般情况
以e结尾
以“辅音字母+y”结尾
以重读闭音节结尾，末尾只有一个辅音字母
2. 不规则动词
二、过去分词的变化
词尾加-ed
词尾加-d
变y为i，再加-d
双写该辅音字母，再加-ed
jumped
lived
studied
stopped
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2. 不规则动词
A - A - A
A - A - B
A - B - A
A - B - B
A - B - C
cut- cut – cut…
beat - beat – beaten…
become - became - become
bring - brought - brought...
begin - began - begun...
二、过去分词的变化
课本P122-123的不规则动词表。
I’m Su Hua. For this report I have _____________(interview) my grandmother. She has _________(live) in Beijing for more than forty years. She has __________(see) the changes in Beijing herself.
China has ________（develop) fast since the reform and opening-up. More and more ring roads and subways have _________（appear) and buildings in Beijing are becoming taller and brighter. People’s living conditions have__________ (improve) a lot. And there are more kinds of food and clothes to satisfy people’s needs（满足人们需求). Children can study not only in modern schools but also on the Internet. People can enjoy good medical care. What’s more, communications are becoming easier and quicker 一people can use telephones, cellphones, fax machines
and the Internet. Beijing has _________（make）rapid progress
（迅速发展） and it has already ___________ (hold) the 2008
Olympic Games.
Practice
interviewed
lived
seen
developed
appeared
improved
held
made
What changes have taken place in Beijing
三、现在完成时的用法
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I have read a book about the development of China.
The writer has lived in China since he was born.
I have watched the book twice.
三、现在完成时的用法
education(教育)
entertainment (娱乐)
science
What changes have taken place in China
W
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用法1：We use present perfect tense to talk about an action that started in the past and continues to the present.
用法2：We use present perfect tense to talk about an action that happened in the past and has a connection with the present.
用法3：We use present perfect tense to talk about how many times an action has happened till now.
The writer has lived in China since he was born.
I have read a book about the development of China.
I have watched the book twice.
三、现在完成时的用法
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1.过去已经开始,一直延续到现在的动作或状态
常与for, since, how long等连用
(1)since+过去点的时间
Mr. Smith has worked here since 1984.
We have known each other since ten years ago.
He’s learned much about English since he went to college.
(2)for+一段时间（数词+量词)
We have known each other for twenty years.
Tip: 与since，for，how long连用的动词为延续性动词。
How long have you had the book (buy-had)
三、现在完成时的用法
三、现在完成时的用法
since + 过去时间（年月日）
since + 一段时间+ago
since + 从句（过去时）
课本P28+P134表格
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【易错】 since 两种句式：
(1）主句（现在完成时）＋since+ 从句（一般过去时）
(2）It is/ has been ＋一段时间＋since从句（一般过去时）
三、现在完成时的用法
1.过去已经开始,一直延续到现在的动作或状态
past
present
since
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【易错】
When常与一般过去时连用，How long常与现在完成时连用
When did you come to Beijing
How long have you been in Beijing
三、现在完成时的用法
1.过去已经开始,一直延续到现在的动作或状态
Practice
1. — I have watched the great movie Gravity already.
— Really When _______ you ________ it
(A) have; watched (B) will; watch (C) would; watch (D) did; watch
2. — How long ___he _____ the book from the library
— For one week.
(A)has, borrow (B)has, kept (C)has, bought (D)did, buy
（2018南通）3．It is almost half a year workers started building the underground Line 1 in Nantong．
(A) when (B) since (C) before (D) after
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2.表示过去发生或已经完成的动作对现在造成的影响或结果
常与never/ever，just，already/yet，before，so far等连用
三、现在完成时的用法
时间状语 含义 位置 用法 举例
already
just
ever
never
before
yet
so far
刚刚
句中
肯定/疑问
已经
句中
肯定句
曾经
句中
疑问/否定
从来没有
句中
否定句
以前(区别ago)
句末
任意
句末
疑问/否定
到目前为止
句首/末
任意
疑问句：已经
否定句：还
I’ve already read this book.
Have you finished your homework already
He has just come back from school．
Have you ever been to Hong Kong ？
I have never travelled by plane before．
Have you been to Hainan before ？
—Has he found his watch yet？ —No, not yet．
I haven’t heard from her so far.
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三、现在完成时的用法
Bob: Hi, Jim! Have you________ seen the movie, My country and I
Jim: No, I haven’t seen it_______. What's it mainly about
Bob: It’s about some important events that happened in China. I have__________ seen it twice and I think it's wonderful.
Jim: Oh. I haven't seen a movie_______ a long time and the film sounds great.
Bob: So you can go to the cinema near my home. The movie has been on there _______ last Sunday.
Jim: But I have ________ been to that cinema. I don’t know how to get there.
Bob: Come to see me on Sunday and I will show you the way.
already yet just ever never for since
ever
already
yet
for
never
since
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3. 表示动作到现在为止进行了多少次
How many times have you watched the film with your friends
I have watched the film twice.
【易错】once的用法
常和once, twice, three times， how many times, never 等连用
三、现在完成时的用法
一次
曾经
一次
现在完成时：I have been to the Great Wall once.
一般现在时：He cleans his car once a week.
一般过去时：There was once a milk tea shop there.
=There used to be a milk tea shop.
与现在完成时
连用的
时间状语
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1. 表示动作开始于过去，持续到现在
for +时间段
since +时间点
how long
2.表示动作发生于过去，跟现在有关联
3.表示动作到现在为止进行了多少次
already, just,
ever, never
yet, before, so far…
recently,
by now,
up to now ,
over the years,
in the past two years
once,
twice,
three times,
how many times,
never ...
其他
四、与现在完成时连用的时间状语
四、与现在完成时连用的时间状语
与现在完成时连用的时间状语:
yesterday, last year, in May, in+过去某一年，
two days ago, the other day, just now…
for, since, how long
already, just, ever, never, yet, before, so far…
once，twice, three times, how many times...
recently, by now, up to now, over the years ,in the past two years…
与过去时连用的时间状语:
—— All over the world, people have cut down millions of trees so far.
—— Forests have already become deserts（沙漠）.
—— Many kinds of animals and plants have just disappeared.（消失）.
—— Humans haven’t solved the pollution problem yet.
—— Carbon dioxide (CO2) in the air has increased a lot over the last century.
What changes have taken place on Earth
We humans have lived on the earth for only 35 000years, but we have changed our planet a lot in many ways. Some things we have done are very good for the earth while others are bad.
Lots of people have realized the problems.
The government has made some laws.
The volunteers have taken action.
Fight for a better future!
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真题链接：
( 2021苏州) 1. The documentary A Plastic Ocean is so impressive that I _________ it several times so far.
watched B. watch C. have watched D. will watch
( 2021南京) 2.I saw Julia in April and I _____ her since then.
A. don’t see B. didn’t see C. won’t see D. haven’t seen
( 2021镇江) 3.In the past 40years, Zhang Guimei ______ many girls from poor areas in Yunnan.
A. helped B.is helping C. has helped D. will help
(2018淮安) 4.The professor reached Nanjing last Wednesday. He there for 10 days．
A．has been B．has got C．has reached D．has arrived
5. —He's never sung English songs before, _________ he
—_________. It's his second time to sing in English.
A. has ;No B. has; Yes C. hasn't; No D. hasn't; Yes
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真题链接：
(2020无锡)1.He sent me a few messages, but I _______________(not reply) yet as I don’t know what to say.
(2019常州) 2. Mum, I ______________(finish) practising the piano. May I go to play football now
(2017苏州) 3.这几年苏州发生了很大的变化。
Suzhou has changed a lot over the years.
Great changes have taken place in Suzhou over the years.
There have been great changes in Suzhou over the years.
(2018苏州) 4.我已经决定读一些书并游览一些名胜古迹。
I have already decided to read some books and visit some places of interest.
haven’t replied
have finished
changes
Present perfect tense
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1.构成
2.变化
3.用法
4.时间状语
Suzhou
Beijing
China
Earth
2022
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Remember the past,
live in the present,
dream about the future!
THANK YOU
2022
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