人教新目标(Go for it)版九年级全册Unit 13 We're trying to save the earth!（Section A GrammarFocus-4c)课件(共50张PPT)

(共50张PPT)
Section A Grammar Focus-4c
Unit 13 We’re trying to save the earth!
九年级下册 RJ
初中英语
1. New words: afford, reusable, transportation
3. Grammar: 能够正确区分和使用以下语法结构：现
在进行时、现在完成时、被动语态、情
态动词、used to等。
2. Expressions: take part in, turn off, pay for, take action
Learning goals
Watch the video and pay attention to the grammar of sentences.
点击，播放视频
Warming up
simple past tense
It was a lovely fresh spring in the meadow.
You found me easily.
present progressive tense
What are you looking at
They are dancing through spring flowers.
present perfect tense
Little Green Worm has grown.
I haven’t seen one quite like this before.
You must be the best finder.
I might be.
modal verbs
Little Green Worm must have been really hungry.
I can’t see anything.
modal verbs
We’re trying to save the earth. Present progressive
The river used to be so clean. used to
The air is badly polluted. Passive voice
No scientific studies have shown that shark fins are good for health. Present perfect
We should help save the sharks. Modal verbs
Read the following sentences and grammar items.
Grammar Focus
Divide the whole class into 4 groups, each group discusses one grammar item based on some questions and sentences, then sum it up.
Group 1：时态 （现在进行时，现在完成时）
Group 2：语态 （被动语态）
Group 3：情态动词
Group 4：used to
Questions and sentences
Questions and sentences
Questions and sentences
Questions and sentences
点击文本框跳转到本组需要回答的问题和能帮助总结语法的例句。
Group 1
现在进行时：什么时候使用现在进行时？
现在进行时的标志性词语有哪些？
现在分词的构成规则有哪些？
现在完成时：现在完成时态的用法有哪些？
现在完成时态的结构是什么？
现在完成时态的标志性词汇有哪些？
过去分词的构成规则有哪些？
现在进行时
① Now people are taking action to save wild animals. Let’s join them.
② Look! Kenny is swimming happily in the pool.
③ Listen to me carefully please. I am talking about something very important.
④ Be quiet, please. The baby is sleeping.
Example sentences
现在完成时 返回
① He has kept this book for over two months. Please ask him to return it soon.
② We have lived here since my little sister was born. I like the people here.
③ He has already tried this to solve the problem, but it didn’t work.
主动语态和被动语态有什么区别？
被动语态的构成是什么？
一般现在时、 一般过去时、一般将来时和情态动词的被动语态的结构分别是什么？
Group 2
① Photos and experiences are shared on the microblog.
② The video was sent out quickly and was seen by many schoolmates.
③ In the future, robots will be used by more and more people.
Example sentences 返回
情态动词有无人称和数的变化？
情态动词后接动词的什么形式？
你知道的情态动词有哪些？各表示什么意思？
Group 3
④ It’s raining outside, so I have to take an umbrella with me.
⑤ Would you please do me a favor Put the map up on the wall please.
⑥ As a student, we should obey the school rules.
⑦ The light is on in the office. Someone may be there.
① Ken can climb up trees like a koala.
② Tracy could ride a bicycle when she was five years old.
③ You mustn’t play with fire. It is dangerous.
Example sentences 返回
used to表示什么意思？后接什么？
used to句型的否定句和一般疑问句的形式是什么？
used to和be used to的区别是什么？
Group 4
Example sentences
① James used to wake up late, but now he gets up very early.
② Did Cherry use to live in Shanghai when she was a child
现在进行时
现在进行时
基本
结构
基本
用法
标志词
be (am/is/are) + 动词-ing
1.表示现在正在进行或发生的动作。
2.表示现阶段或当前一段时间之内
正在进行的动作。
now、look、listen、these days等
动词-ing形式的构成
a.一般情况下，在动词词尾后加-ing。
如：go → going。
b.以不发音的e结尾的动词，去掉e加-ing。
如：have → having。
c.以重读闭音节结尾的动词，末尾只有一个辅音字母，双写这个辅音字母，再加-ing。
如：run → running。
现在完成时
现在完成时
基本
结构
基本
用法
标志词
have/has + 过去分词
1. 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。
2. 从过去某一时间开始并一直持续到现在且还有可能持续下去的动作。
already、yet、ever、never、for +时间段、since +时间点、so far、in the last/past...years等
过去分词的构成
一般情况下，在动词后加-ed。如: work → worked。
在以e结尾的动词后只加-d。如: close → closed。
以辅音字母加y结尾的动词，应将y改为i再加-ed。如: study → studied。
以重读闭音节结尾的动词，要双写末尾的辅音字母再加-ed。如: stop → stopped。
过去分词的构成
不规则动词的过去分词:
AAA型 put put put
AAB型 beat beat beaten
ABA型 become became become
ABB型 get got got/gotten
ABC型 begin began begun
用括号中所给动词的正确形式填空。
The girls ___________ (dance) in the classroom now.
It’s 5 o’clock now. Mike ____________ (have) dinner.
— _______ you ever ________ (be) to the US
— Yes, twice.
4. I __________ (live) here since 1999.
are dancing
练一练
is having
Have been
have lived
主动语态和被动语态的区别
主动语态表示主语是动作的执行者。被动语态表示主语是动作的承受者，即行为动作的对象。
I cleaned my room. → My room was cleaned by me.
I saw him cross the road and enter the shop. → He was seen to cross the road and enter the shop.
被动语态
在含有使役动词 (如：make) 或感官动词 (see、watch、notice、hear等) 的主动语态的句子中，这些词后常跟省略to的动词不定式，但是改为被动语态时则要把省去的to还原。
被动语态的构成
被动语态的基本结构：助动词be + 及物动词的过去分词
一般现在时的被动语态：am/is/are + 过去分词
一般过去时的被动语态：was/were + 过去分词
一般将来时的被动语态：will be/is going to be + 过去分词
含情态动词的被动语态：情态动词 + be + 过去分词
用括号中所给动词的正确形式填空。
1. — Do you often clean your classroom
— Yes. Our classroom ____________ (clean) every day.
2. — Did you go to Jack’s birthday party
— No, I _______________. (invite)
3. A new highway in my hometown (build)
next month.
is cleaned
练一练
wasn’t invited
will be built
情态动词
1. 情态动词一般没有人称和数的变化。
2. 情态动词后接动词原形。
3. 常用的情态动词有：can/could、may/might、must/have to、should/ought to、would、need等。
根据题意选择最适合的情态动词。
1. — you pass me a pen I’d like to write down the phone number.
— Sure. Here it is.
A. Can B. Need C. Might D. Must
2. You worry about me. It’s nothing serious.
A. can’t B. mustn’t C. needn’t D. won’t
A
练一练
C
3. — May I go to the cinema, Mom
— Certainly, but you be back by 11 o’clock.
A. can B. may C. must D. need
4. — Excuse me. Is this the right way to the Summer Palace
— Sorry, I’m not sure. But it be.
A. might B. mustn’t C. can’t D. must
5. The man in the office be Mr. Black, because he went home just now.
A. mustn’t B. may not C. can’t D. needn’t
C
A
C
used to
used to意为“过去常常做某事”，后接动词原形。
used to句型的否定句形式：didn’t use to...
used to句型的一般疑问句形式：Did + 主语 + use to...
used to do表示过去常常做某事，而现在往往不做了；be used to doing表示习惯于做某事。
根据汉语意思补全句子。
1. 她过去常常周末和朋友闲逛。
She _____________________ with friends on weekends.
2. 他习惯于每天晚上睡得很晚。
He ____________________________ at night.
used to hang out
练一练
is used to staying up
4a Fill in the blanks with the correct forms of the verbs in brackets.
Joe: ______ you ever ________ (take) part in an
environmental project
Ken: Yes, I have. I _______ (help) with a Clean-Up Day
last year. It was __________ (consider) the biggest
clean-up project this city______ ever ________ (have).
Joe: How many people ________ (take) part
Have
taken
helped
considered
had
had
took
Presentation
Ken: I ___________ (think) more than 1,000 people
______(come) to help out.
Joe: That’s fantastic! I guess everyone in this city is
______ (try) to improve the environment.
Ken: Yes, we can’t afford to________ (wait) any longer
to take action!
think
came
trying
wait
1. Have you ever taken part in an environmental project (教材P100 4a)
take part in 参加
take part in多指参加会议或集体性的工作或活动，且参加者在其中发挥一定的作用。
Li Lanjuan headed for Wuhan and took an active part in the battle.
Language points
2. Yes, we can’t afford to wait any longer to take action! (教材P100 4a)
afford / f (r)d / v. 承担得起（后果）；买得起
afford作动词，常用在can、could、be able to等之后。afford sth.“买得起某物”；afford to do sth.“负担得起做某事”。
I can’t afford the new TV.
I hope I can afford to buy a big house one day.
Language points
People _________ think that big things__________________ be done to save the earth. Many forget that saving the earth begins with small things. For example, you ______________ save electricity by turning off the lights when you leave a room. You _______________ also use reusable bags instead of plastic bags.
4b Fill in the blanks with the appropriate modal verbs from the box.
can
would
could
have to
should
must
may/
might
may/might
should/have to/must
can/could/should
can/could/should
adj. 可重复使用的；可再次使用的
关掉
I think it’s a great idea that you now _______ pay for
plastic bags in some stores. And instead of driving to school or work, you _______________ ride your bike or walk. If it’s far, you __________ take the bus. All these small things __________ add up and become big things that ______________ improve the environment. Let’s take action now!
have to
can/could/should
can/could
can/could
would/can/could
付费；付出代价
采取行动
4c Make a list of things that people can do to help the
environment and discuss your list with your partner.
I think that everyone should use public transportation.
I disagree. It’s difficult for parents with young children to use public transportation...
use public transportation
n. 运输业；交通运输
1.(2021 ·重庆中考A卷) Listen! Our science teacher ________ the use of the robot.
A. explains B. explained
C. is explaining D. has explained
单项选择
C
Exercises
2.(2021 ·安徽中考) — Our computer is working again!
— Yes. Our IT teacher ________ it. It took him about an hour.
A. has fixed B. will fix C. is fixing D. was fixing
3.(2021 ·铜仁中考) — Must I wash my clothes at once, Mom
— No, you ________. You ________ wash them before 5:00 p.m.
A. needn’t; may B. mustn’t; may
C. needn’t; need D. mustn’t; must
A
A
4.(2021 ·泸州中考) “I’m still working because I’m still capable and hope to guide more young people,” said Wu Mengchao when he _______.
A. is interviewed B. is interviewing
C. was interviewed D. was interviewing
C
5.(2021 ·天津中考) — Where is Mum
— In the living room. She ________ a book at the moment.
A. was reading B. will read
C. is reading D. has read
C
6.(2021 ·南京中考) 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
D
7.(2021 ·连云港中考) What an amazing robot! It _______ cook more than 5,000 dishes.
A. shall B. need C. must D. can
8.(2021 ·武汉中考) — Only ten tickets What do you mean There _______ be twelve.
— Sorry, Linda. Jacky and Tim took two tickets away.
A. should B. will C. can D. may
D
A
9.(2021 ·达州中考) — Why do some whales have to ________
— Because humans catch whales for meat, fat and oil. Some of them are ________.
A. protect; dangerous
B. protect; endangered
C. be protected; dangerous
D. be protected; endangered
D
Summary
Key words
Useful expressions
Grammar
take part in, turn off, pay for, take action
①现在进行时
②现在完成时
③被动语态
④情态动词
⑤used to
afford, reusable, transportation
1.Write a short passage about protecting the earth according to your discussion in 4c.
e.g. I think that everyone should use public transportation. It’s not only convenient but also…
2. Preview the new words in Section B (1a-1e).
Homework
THANKS
谢谢聆听！