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(共25张PPT)
Unit 1
This is me!
外研版2024八年级上册英语
（Grammar）
Think and share
目 录
CONTENTS
04 Exercise
03 Production
02 Presentation
01 Lead-in
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01 Lead-in
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Lead-in
(a) I haven't told Maddie yet...
(b) I have already learnt that I am what I am.
Now find one more sentence with these structures in the reading passage.
Read the sentences from the reading passage and summarise the grammar rules.
现在完成时
have/had /has+done
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02 Presentation
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Presentation
定义-1
定义1：从过去开始并延续到现在，可能还将延续下去
要点：过去开始+延续到现在
eg: a) Lily has studied in No.1 Middle School since two years ago.
b) They have lived in Changzhou for ten years.
该定义强调在“现在”这个时间点，动作是存在的。
动词在now这个点是存在的，可能到此结束，也可能继续下去
注意：若在now这个点动作不存在，则是一般过去时。
A
B
now
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定义2：动作发生在过去并已结束，但对现在有影响或与某种联系。
要点：过去发生+对现在有影响/联系
eg：a) Who has cleaned the room. It’s clean and tidy.
b) I won’t see the film with you. I have seen it.
该定义强调过去动作对现在的影响或联系；若不存在影响或练习，则是一般过去时。
Presentation
定义-2
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定义3：在过去一段时间内，动作发生了多次。（包括零次never）
要点：次数
eg：
a) We have been to the UK three times.
b) How many times has Peter visited the Shanghai Museum over the
past years
Presentation
定义-3
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Presentation
现在完成时的构成
现在完成时谓语由“助动词have/has+动词的过去分词”构成。
1.肯定式
结构：主语+have/has + 动词的过去分词(+其他).
I/You have worked.我/你工作了。
He/She/lt has worked.他/她工作了。/它奏效了。
We/You/They have worked.我们/你们/他们工作了。
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Presentation
现在完成时的构成
2.否定式
结构：主语+have/has+not+动词的过去分词(+其他).
I /You have not worked. 我/你还没有工作。
He/She/It has not worked. 他/她还没有工作。
We/You/They have notworked.
我们/你们/他们还没有工作。
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Presentation
现在完成时的构成
3.疑问式
结构：Have/Has +主语+动词的过去分词(+其他)
Have //you worked 我/你工作了吗
Has he/she/it worked 他/她工作了吗 /它奏效了吗
Have we/you/they worked 我们/你们/他们工作了吗
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Presentation
现在完成时的构成
4.简略回答
结构：肯定回答:Yes，主语 +have/has.
否定回答:No，主语+haven't/hasn't.
Have we/you/they worked 我们/你们/他们工作了吗
肯定:Yes,you/ have. 是的,你/我工作了。
否定: No, you/ haven't. 不，你/我没有。没有。
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Presentation
动词的过去分词的构成原则
1.规则动词的变化规则
（1）大部分动词在词尾直接加 -ed
clean→cleaned 打扫 help → helped 帮助 play→ played 玩耍
（2）动词以不发音的字母e结尾时，直接加 -d
like → liked 喜欢 live →lived 居住 love → loved 喜爱
（3）动词以“辅音字母+y”结尾时,变y为i再加 -ed
try→ tried 尝试 study→studied 学习 marry→married 结婚
（4）动词为重读闭音节且词尾只有一个辅音字母时,须双写这个辅音字母再加-ed
plan→planned 计划 stop→stopped 停止 prefer→preferred 更喜欢
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Presentation
动词的过去分词的构成原则
2.不规则动词的变化规则
须根据不规则动词变化表专门记忆
see-seen 看到 hear heard 听到
go-gone 去 fnd-found 发现
eat-eatenl吃 beat-beat 打败
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Presentation
现在完成时的标志
(1) 常与just, already, yet, ever , never ,before,sofar 等连用,强调动作完成,
不强调动作的持续。
Have you ever been to Japan
你曾经去过日本吗
I have just finished my homework.
我刚刚完成我的家庭作业。
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Presentation
现在完成时的标志
(2) for+时间段;
since+过去时间点;
since+时间段+ago;
since+ 一般过去时的句子。
They have known each other for five years. 他们相识5年了。
I haven't played soccer since I left school.
自从离开学校后我就没踢过足球。
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03 Production
1. I/ just / cut my long hair
.
2. She / never / worry about / her looks
.
3. l/just / paint a beautiful flower / on my face
.
4. Chris / always / wear / a pair of glasses
.
5.Jessica / already/ change her opinion /on her looks
.
Write sentences with the present perfect tense.
I have cut my long hair.
She haven’t worried about her looks .
I have painted a beautiful flower on my face.
Chirs has worn a pair pf glasses.
Jessica has already changed her opinion on her looks.
Production
I was the tallest student in my class. Now, I'm still the tallest. I sat on the last row in primary school. Now at junior high, I'm still sitting on the last row. People always look at me in surprise. "You must be good at basketball," my classmates at primary school always said that. Now at junior high, my classmates say the same. In fact, I'm not good at basketball at all. But being tall is not always bad. lt makes me easy to recognise, and I can help others reach things down.I couldn't accept my height, but I learn to do it now. I'm proud of myself.
Rewrite the underlined sentences using the present perfect tense.
Production
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04 Exercise
Exercise
一、单项选择
1．—Wow, your bike looks really new. I wonder ________.
—My father bought it for me as a birthday gift last year.
A．how long have you had it B．how soon will you have it
C．how long you have had it D．how soon you will have it
2．The man _____ himself to the hot search list several times because of photos with famous singers.
A．makes B．is making C．will make D．has made
3．—Where is your brother I haven’t seen him recently.
—Oh, he has _____ to Beijing for a meeting. He has _____ there for a week.
A．gone; gone B．been; gone C．gone; been D．been; been
C
D
C
Exercise
4．—Simon, you are late. The match ________ since half an hour ago.
—What a pity! All the basketball players have left.
A．has started B．has been on C．has finished D．has been over
5．Tom _____ many places in China since three years ago.
A．visits B．visited C．has visited D．will visit
6．______ he ever ______the film before
A．Does; see B．Have; seen C．Did; see D．Has; seen
7．Lily says she _____ the book for ten days and she has to return it to the library today.
A．has borrowed B．borrowed C．has kept D．is going to borrow
D
C
D
C
Exercise
8．They have ______ finished doing the housework, but they haven’t done their homework ________.
A．already; yet B．yet; already C．yet; yet D．already; already
9．Brian ______ opera since he came to China in 2021.
A．studies B．studied C．has studied D．will study
10．My parents _______ Beijing on business for a whole week, so I live with my grandparents these days.
A．have been to B．have been in C．have gone to D．have arrived in
11．—Is Mr. Clark there I need to talk to him.
—Sorry, he _____ Shanghai on business for three days.
A．went to B．has gone to C．has been in D．has been to
A
C
B
C
Exercise
12．Volunteers in Nanjing ________ over 1,000 trees along Yangtze river since the ‘Protect Mother River’ project began in 2021.
A．plant B．planted C．have planted D．will plant
13．—Mom, I want to watch The Lion King on CCTV Channel 6 tonight.
—Oh, e on! It ________ for a few minutes.
A．has begun B．will begin C．has been on D．will be on
14．—Why are you in such a hurry —Because the class ________ for 10 minutes.
A．is on B．begins C．has been on D．has begun
15．Daming ________ a member of the school space club for two years.
A．was B．is C．will be D．has been
C
C
C
D
Thank you

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