英语九年级全一册Unit 13We're trying to save the earth! Section A Grammar Focus-4c.（共有PPT42张）

(共42张PPT)
Section A
GF-4c
Unit 13
We’re trying to save the earth！
Revision
不同种类的污染
2. 河底
3. 把垃圾扔到河里
4. 在……中起作用
different kinds of pollution
the bottle of the river
throw rubbish into the river
play a part in
Check if you know these phrases.
5. 在中国南部
6. 对……有害
7. 在……顶部
8. 海洋生态系统
in southern China
be harmful to
at the top of
the ocean’s ecosystem
Translate the sentences.
1. 甚至是河底都满是垃圾。
2. 这个方法不仅残酷还对环境有害。
Even the bottom of the river was full of rubbish.
This method is not only cruel, but also harmful to the environment.
3. 鲨鱼处于海洋食物链的顶部。
4. 许多人相信鱼翅对健康有好处。
Sharks are at the top of the food chain in the ocean’s ecosystem.
A lot of people believe that shark’s fins are good for health.
take part in
afford
turn off
reusable
pay for
take action
transportation
参加
v. 买的起；承担的起（后果）
关掉
adj. 可重复使用的
付费；付出代价
采取行动
n. 运输业；交通运输
Words Review
Grammar Focus
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
① 肯定句: 主语 + am/is/are + -ing
② 否定句: 主语 + am/is/are + not + -ing
③ 疑问句: Am/Is/Are + 主语 + -ing
现在进行时
现在进行时表示现在或现阶段正在进行或发生的动作。
现在进行时--基本结构
1.The girls ___________ (dance) in the classroom now.
2. It’s 5 o’clock now. Mike __________ (have) dinner.
3. — ______ he _______ (clean) the blackboard
— No, he isn’t.
4.Tom _________ (play) football on the
playground at the moment.
are dancing
is having
Is cleaning
is playing
肯定句：主语 + have / has + 过去分词 + 其他
否定句：主语 + haven’t / hasn’t + 过去分词 + 其他
一般疑问句：
Have / Has + 主语 + 过去分词 + …？
肯定答语：Yes, 主格代词 + have / has.
否定答语：No, 主格代词 + haven’t / hasn’t.
现在完成时--构成
1. 表示动作到现在为止已经完成或刚刚完成。
2. 动作发生在过去，强调对现在的结果、影响等。
3. 表示动作发生在过去，并且一直持续到现
在，甚至还可能继续下去，句中使用持续性
动词，且常有表示一段时间的时间状语。
4. 现在完成时可以用在条件或时间状语从句
中，表示将来某个时刻之前已经完成的动作。
现在完成时--用法
1. I __________ (live) here since 1999.
2. — ______ you ever ______ (be) to the USA
— Yes, twice.
3. — May I speak to John
— Sorry, he _________ (go) to New York. He will be back in two days.
4. — Do you know Mr. White well
— Yes. He ___________ (work) for the WWF for two years.
Have been
has gone
has worked
have lived
被动语态表示主语是谓语动作的承受
者，被动语态由“be + 过去分词”构成。be随着主语人称和数以及时态的不同而变化。含有情态动词的被动语态由“can / must / may / should … + be + 过去分词”构成。
被动语态
The first section of New College
English is designed for speaking practice
and is based on pictures and topics.　　
These computers were made in our own country last year.
Shall we be asked to attend the opening ceremony 　
①一般现在时的被动语态：am/is/are + 过去分词
　　
②一般过去时的被动语态：was/were+过去分词
③一般将来时的被动语态：will/shall+be+过去分词
Exercise
Ⅰ. 单项选择
1. — Today Chinese is becoming more and
more popular.
—It _______ in many schools around the
world.
A. teaches B. is teaching
C. has taught D. is taught
D
2. We _______ to close the windows before we left the lab.
A. tell B. told
C. are told D. were told
3. — Did you hear that water in Tai Lake smelt terrible
— Yes. In fact, it _______.That's all because of the people and the factories around.
A. polluted B. was polluted
C. has polluted D. will pollute
D
B
情态动词
情态动词具有一定的意义，但不能单独作谓语，其后需接动词原形一起构成句子的谓语。情态动词(除have to以外)没有人称和数的变化。另外，情态动词可用来构成否定句、疑问句并进行简略回答。初中常见的情态动词有：can, may, must, need, have to, could, should, ought to 等。
考点一：考查表示“能力”的情态动词
情态动词——考点
1. — ________ your Australian friend eat
with chopsticks
— Yes, but she can’t use them well.
A. Should B. Need
C. Can D. Must
2. The work is too hard for us. We _______
finish it on time.
A. can’t B. mustn’t
C. shouldn’t D. needn’t
3. — Could your father play golf when he
was young
— No, he ________. But he ________
play table tennis.
A. couldn’t; could B. needn’t; might
C. mustn’t; should D. shouldn’t; need
【考点点拨】
★情态动词can表示“能力”时，与be able to同义，其否定形式为can’t。can表示现在的能力，其过去式could表示过去的能力。
used to 结构
used to意为“过去常常做某事”，指的是过去的习惯性动作，目的在于与现在形成对照。
它的疑问式是：Did ＋主语＋use to do sth．
否定式是：主语＋didn't use．
或疑问式：Used ＋主语＋to sth．
否定式应当是used not to.
比较： be used to do sth.
该句式表示“被用于(做某事)”。注意: 句式中used是use的过去分词, be used是被动语态; to为不定式符号,后跟原形动词。例如:
Don't throw away the papers. They can be used to make a fire.
别扔掉这些报纸, 它们可以用来引火。
Wood can be used to make paper.
木头可以用来造纸。
知识链接
比较：be (get) used to sth. / doing sth.
be used to + doing：
“对……已感到习惯”，或“习惯于”，to是介词，后需加名词或动名词。
知识链接
I found the job tiring at first but soon I was / got used to it.　
刚开始我觉得这个工作很累，但是
不久就习惯了。　
句型转换
1. He used to take a walk in the park here. (改为否定句)
He _____ ____ / _______ to take a walk in the park here.
didn’t use
usedn’t
2. She used to hang out with friends on weekends. （改为一般疑问句并作回答）
— _______ she _______ _______ hang out with
friends on weekends
— Yes，she _______. / — No, she _______.
3. The boy used to chew gum a lot,
______________ he （完成反意疑问句）
Did
use to
did
didn’t
didn’t / usedn’t
He used to _______ in the sun, but now he is used to _______ at night.
A. read, read B. reading, read
C. read, reading D. reading, reading
[解析]考查固定结构的用法。used to后接动词原形，be used to 后接动名词。故选C。
典型例题
4a
Fill in the blanks with the correct forms of the verbs in brackets.
Joe: _____ you ever ______ (take) part in an environmental project
Eric: Yes, I have. I ______ (help) with a
Clean-Up Day last year. It was
__________ (consider) the biggest
clean-up project this city ____ ever
____ (have).
Have
taken
helped
considered
had
had
参加
Fill in the blanks with the appropriate model verbs from the box.
4b
may/might
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.
can would could have to should must may/might
must/have to
can/should/could
can/could/should
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!
can would could have to should must may/might
can/could/should
can/could
can/could
have to
would/can/could
4c
Make a list of things that people can do to help the environment and discuss your list with your partner.
use public transportation (n.交通运输);
turn off the lights when you leave a room;
use reusable bags instead of plastic bags;
ride your bike or walk to school or work;
stop using paper napkins(餐巾纸);
recycle books and paper
…
Discussing...
4c
use public transportation
take your own shopping bags when go shopping
reduce the use of air conditioners in summer
turn off the lights when you leave the room
grow more plants...
A: I think that everyone should use public
transportation.
B: I disagree. it's diffcult for parents with
young children to use public transportation.
A: I think that everyone should grow more
plants.
B: I agree. growing more plants will provide
us more fresh air and make our plant
more beautiful.
A: I think that everyone should use public
transportation.
B: I disagree. it's diffcult for parents with
young children to use public transportation.
A: I think that everyone should grow more
plants.
B: I agree. growing more plants will provide
us more fresh air and make our plant
more beautiful.
我都 学会了!
本课句型
Summary
I. 用所给词的适当形式填空。
1. The old man used _____ (be) a teacher.
2. We should _____ (clean) the room every day.
3. Look! Tom _________ (sleep) in his room.
4. Lots of trees __________ (plant) on the hill every year.
5. He _________ (live) here for 20 years.
to be
clean
is sleeping
are planted
has lived
Exercises
用括号里所给动词的正确形式填空
1. --Do you know Mr.White well
-- Yes. He __________(work) for the WWF for two years.
2. I __________ (live) here since 1990.
3. -- Do you often clean your classroom
-- Yes. Our classroom __________(clean) every day.
has worked
have lived
is cleaned
4.-- What's this
--It's a CD. This CD _________(use) for learning English.
5. Anew highway in my hometown ___________ (bulid) next month.
is used
will be built
1. It's getting dark. Please ________ the light.
A. turn on B. turn off
C. turn down D. turn around
2. How does Jack usually go to work
—He ______ drive a car, but now he ______ there to lose weight.
A. used to; is used to walk
B. was used to; is used to walking
C. was used to; is used to walk
D. used to; is used to walking
3. In the last ten month, September Miracle(奇迹)____on CCTV for more than five times and is popular all over the country.
A. has played the piano
B. has given out their song disks
C .has written songs
D. has performed
4. Not only my friends but also I _______ interested in football and Messi is our favorite star.
A. be B. am C. is D. are
5. —At present, one of the best ways to study is working in groups.
—More chances _______ to students to learn from each other.
A. offer B. are offered
C. have offered D. are offering
Homework
1.write an article to show in what way
we students can protect the environment.
Thank you !