Unit 13 We’re trying to save the earth! Period 3 Section A (Grammar Focus-4c) 课件（34张PPT）

(共34张PPT)
Unit 13
We’re trying to save the earth!
Period 3 (Grammar Focus-4c)
人教版九年级
Language Goal
1. Make a revision of “Present progressive”, “used to”, “Passive voice”, “Present perferct”, “Modal verbs”.
2. Know how to choose the right tense in different situations.
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 bottom of the river
throw rubbish into the river
play a part in
I. 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
II. Translation.
1. 甚至河底都满是垃圾。
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.
Mark and Tony didn’t go swimming in the river because the river _____ (be) badly polluted. It was really dirty now. People are ________ (throw) litter into the river, and factories ____ (be) also _______ (put) waste into the river. In fact, it ________ (use) be so clean, and it has always _____ the nicest river in this town. Tony thinks that they ______(must/should) write to the government and let the government close down the factories. Mark advises that everyone in this town _______ (must/should) help to clean up the river not just the government.
Fill in the blanks with the correct forms.
was
throwing
are
putting
used to
been
should
should
Mark and Tony didn’t go swimming in the river because the river _____ badly polluted. It was really dirty now. People are ________ litter into the river, and factories ____ also _______ waste into the river. In fact, it ________ be so clean, and it has always _____ the nicest river in this town. Tony think that they ______ write to the government and let the government close down the factories. Mark advise that everyone in this town _______ help to clean up the river not just the government.
was
throwing
are
putting
used to
been
should
should
Find Passive voice.
被动语态：Passive voice
定义：表示主语是动作的承受者，
即行为动作的对象的一种语态。
结构：be + 过去分词
e.g. A new school was built last year.
Our classroom is cleaned every day.
Translate the sentences by using Passive voice.
1. 刚才一些老年人参观了博物馆。
2. 工人们使用不同种类的机器工作。
The museum was visited by some old people just now.
Different kinds of machines are used to work by the workers.
Mark and Tony didn’t go swimming in the river because the river _____ badly polluted. It was really dirty now. People are ________ litter into the river, and factories ____ also _______ waste into the river. In fact, it ________ be so clean, and it has always _____ the nicest river in this town. Tony think that they ______ write to the government and let the government close down the factories. Mark advise that everyone in this town _______ help to clean up the river not just the government.
was
throwing
are
putting
used to
been
should
should
Find Present progressive.
现在进行时: Present progressive
结构: be (am/is/are) + v.-ing
标志词：Look, Listen, now, right now …
e.g. Look! The boy is crying.
定义：表示说话时(瞬间)正在进行的动作, 也表示目前或现阶段正在进行的动作。
What a fine day today!
Look! What are they doing
Mark and Tony didn’t go swimming in the river because the river _____ badly polluted. It was really dirty now. People are ________ litter into the river, and factories ____ also _______ waste into the river. In fact, it ________ be so clean, and it has always _____ the nicest river in this town. Tony think that they ______ write to the government and let the government close down the factories. Mark advise that everyone in this town _______ help to clean up the river not just the government.
was
throwing
are
putting
used to
been
should
should
Find used to pattern.
used to do sth. 表示过去常常做某事, 而现在往往不做了, 后接动词原形。
be used to doing sth. 表示习惯于做某事
e.g. I used to get up at six o’clock.
Joe is used to drinking a cup of coffee every morning.
used to do与be used to doing
Translation.
1. 她过去常常周末和朋友闲逛。
She used to hang out with friends on weekends.
2. 他习惯晚睡。
He is used to staying up.
Mark and Tony didn’t go swimming in the river because the river _____ badly polluted. It was really dirty now. People are ________ litter into the river, and factories ____ also _______ waste into the river. In fact, it ________ be so clean, and it has always _____ the nicest river in this town. Tony think that they ______ write to the government and let the government close down the factories. Mark advise that everyone in this town _______ help to clean up the river not just the government.
was
throwing
are
putting
used to
been
should
should
Find Present perfect.
结构: has/have + 过去分词
标志词：already, yet, ever, never, since, for …
e.g. I haven’t finished my homework yet.
定义：表示动作已经完成, 但对现在造成影响; 或者表示从过去某一时间开始，一直延续到现在并还可能持续下去的动作。
现在完成时: Present perfect
Complete the following sentences.
I _________ (be) in Beijing for two years.
2. I _____ never _____ (hear) of that man before.
3. Tom __________ (work) there since two years ago.
have been
have
heard
has worked
4. The twins ___________ (wash) the clothes for an hour.
5. He _________ (play) basketball since three years ago.
6. How long ____ Sally _____ (sing) yet
have washed
has played
has
sung
Mark and Tony didn’t go swimming in the river because the river _____ badly polluted. It was really dirty now. People are ________ litter into the river, and factories ____ also _______ waste into the river. In fact, it ________ be so clean, and it has always _____ the nicest river in this town. Tony think that they ______ write to the government and let the government close down the factories. Mark advise that everyone in this town _______ help to clean up the river not just the government.
was
throwing
are
putting
used to
been
should
should
Find Modal verbs.
1. 情态动词本身有一定的词义, 表示说话人的情绪、态度或语气, 但不能单独作谓语, 只能与其他动词构成谓语。常见的有: can (could), may (might), must, need, shall (should), will (would)等。
情态动词
2. 情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式, 可用来表达更加客气、委婉的语气。
e.g. Ken can climb up the trees like a koala.
Tracy could ride a bicycle when she was five years old.
You mustn’t play with fire. It is dangerous.
表“能力”或“许可”。可以用在否定句中表推测。
表“必须”，语气较为强烈。可以用在肯定句中表推测，肯定的语气很强。
意为“应该”，否定式是shouldn’t，意为“不应该”。
need
should
could
may
could既是can的过去式，本身也是情态动词，
语气较为委婉。
表“许可”，语气较委婉。可以用在肯定句中表推测，肯定语气小于must。
可以作情态动词，还可以作实义动词。need to do sth.意为“需要做某事”。
must
can
Translation.
1. 我们不能在教室里吃东西。
2. 首先你必须完成作业。
3. 他现在不可能在家。
4. 她一定知道这个问题的答案。
We can’t eat in the classroom.
You must finish your homework first.
He can’t be at home now.
She must know the answer to this question.
Fill in the blanks with the correct forms of the verbs in brackets.
4a
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
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
Fill in the blanks with the appropriate modal verbs from the box.
4b
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
may/might
must/have to/should
can/could/should
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 good things that _______________ improve the environment. Let’s take action now!
have to
can/could/should
can/could
would/can/could
can/could
Make a list of things that people can do to help the environment and discuss your list with your partner.
4c
I think that everyone should use public transportation.
I disagree. It’s difficult for
parents with young children to use public transportation …
Language points
1. We can’t afford to wait any longer to take action!
afford v. 承担得起; 提供, 给予
afford to do sth. (常与can, be able to连用) 买得起; 负担得起
e.g. We can’t afford to pay such a price.
我们付不起这个价钱。
Dancing affords us pleasure.
跳舞给我们带来快乐。
Language points
2. … save electricity by turning off the lights
when you leave a room.
turn off 关掉
e.g. Please turn the television off before you go to bed.
睡觉前请关掉电视。
turn around 转身
turn up 调高(音量)
turn down 调低; 拒绝
turn into 变成; 进入
turn on 打开, 发动
turn off 关掉, 关闭
turn out to be 结果是
turn over 移交
拓展: turn相关短语
Exercises
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
Ⅱ. 用括号里所给动词的正确形式填空。
1. The girl ___________(dance) in the classroom now.
2. It’s 5 o’clock now. Mike _________ (have) dinner.
3. —_____ you ever ____ (be) to the US
— Yes, twice.
4. — May I speak to John
— Sorry, he __________(go) to New York. He will be back in two days.
5. — Did you go to Jack’s birthday
— No, I ______________(not invite).
is dancing
is having
Have been
has gone
was not invited
6. — Do you know Mr. White well
— Yes. He __________(work) for the WWF for two years.
7. I __________ (live) here since 1990.
8. — Do you often clean your classroom
— Yes. Our classroom __________(clean) every day.
9. — What’s this
— It’s a CD. This CD _________(use) for learning English.
10. A new highway in my hometown ___________(bulid)
next month.
has worked
have lived
is cleaned
is used
will be built
Write an article to show in what way
we students can protect the environment.