课件28张PPT。 Unit 13
We're trying to save the earth!Section A
2d&Grammar focus人教新目标(Go for it)九年级全册Revision1. close down
2. be full of
3. throw away
4. clean up
5. play a part (in doing)关闭
充满
扔掉
清理
在做…中起作用Interviewer: Jason and Susan,what are your ideas for solving these problems?
Jason: Well,to cut down air pollution,we should take the bus or subway instead of driving.
Susan: Yeah,or ride a bike. There are
other advantages of bike riding. Interviewer: Great ideas!What about
waste pollution?Listen and repeat.2dSusan: Mmm, I think simple things like bringing a bag to go shopping can help. I started doing that a year ago.
Jason: Me,too. Also, I never take wooden chopsticks or plastic forks when I buy takeaway food. I use the ones at home.
Susan: And remember to throw rubbish in the bins and keep public places clean and beautiful for everyone.
Interviewer: So together, our actions can make a difference and lead to a better future！Read 2d carefully and complete the chart.bus/subwaya bikea bagchopsticksin the binsCan you translate the following into English?减少
代替（做某事）
骑自行车（名词）
对...有好处
外卖食品
记得要做某事
产生影响或作用
导致,引导cut downinstead of doing sthbike ridingbe good fortake away foodremember to do sth make a differencelead to1.Well,to cut down air pollution,we should take the bus or subway instead of driving.2.There are other advantages of bike riding.
advantage:优点;有利条件
反义词:disadvantage缺点,不利条件
advantage的相关短语：
take advantage of... 利用……
to one’s advantage 对某人有利
eg: I have the advantage of him in running.
我在跑步方面条件比他优越。
To her advantage,her voice is very sweet.
对她有利的是,她的声音非常甜美。3.It’s good for health and it doesn’t cost anything!
cost v. 花费；使付出.指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。
e.g.The new shirt cost Mr Wang 200 yuan.
王先生花了200元买了新衬衫。
How much does the new computer
cost? 新电脑花了多少钱？
【辨析】
take，spend，pay和cost都可以表示
“花费”，但它们的用法各有不同。根据句意用take, spend, pay或cost的适当形式填空。
1. That new car ________?them lots of money.
2. Mona __________ 50 yuan on the books just now.
3. It usually _______? me an hour to do my homework.
4. You should __________? some time practising your pronunciation.
5. My brother _______?6, 000 yuan for the new computer yesterday.cost??spent?takesspendpaidGrammar Focus 现在进行时: Present progressive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。 结构: be (am/is/are) + v.-ing
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
标志词：Look, Listen, now, right now…
e.g. She is watching TV now.她现在正在看电视。
Look！The panda is climbing a tree.
看！那只熊猫正在爬树。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 dancingis havingExercise Is cleaningis playing used to do与be used to doingused 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
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 late. 用括号内所给动词的适当形式填空。
My sister used to _______ (be) a nurse.
I’m used to _______ (wash) my face with cold water.
My pen friend used to ________ (speak) Japanese, but now he is used to ________ (speak) Chinese. bewashing speakspeakingExercise 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. The book was written by Lu Xun.
这本书是由鲁迅写的。
注意：主动语态中，在make，let，hear，see，watch，notice等词后跟省略to的动词不定式，但在被动语态中，to不可省略。
eg：We saw a stranger enter the hall.→
A stranger was seen by us to enter the hall.
我们看到一个陌生人进入了大厅。1. — Do you often clean your classroom?
— Yes. Our classroom ___________
(clean) every day.
2. — Did you go to Jack’s birthday party?
— No. I _____________ (not invite).
3. — What is this?
— It’s a CD. This CD ________ (use) for learning English.is cleanedwasn’t invitedis usedExercise 现在完成时: Present perfect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。 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.
我还没完成我的作业。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 gonehas workedhave livedExercise 情态动词 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。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。ExerciseWe 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.4aFill 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 takenhelpedconsideredhadhad参加Joe: How many people ____ (take) part?
Eric: 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.
Eric: Yes, we can’t afford to ____ (wait)
any longer to take action!tookthinkcametryingwaitv. 承担得起(后果); 买得起afford to do sth.4bFill in the blanks with the appropriate modal verbs from the box.can would could have to should must may/ mightPeople __________ 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.may/mightmust/ have tocan/ could/ shouldcould/ can/ shouldadj.可重复使用的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/ mighthave to can/should/ couldcan/couldcan/ couldwould/can/ could采取行动4cMake a list of things that people can do to help the environment and discuss your list with your partner.use public transportation
_________________________bring a bag to go shoppingA：I think that everyone should use public transportation.
B：I disagree. It’s difficult for parents with young
children to use public transportation...1. I _________ (be) in Beijing for two years.
2. I _____ never _____ (hear) of that man before.
3. Tom __________ (work) there since two years ago.
4. The clothes ___________ (wash) just now.
5. He used_______ (play) a lot, but now he likes studying.
6. —Where is Tom?
—He _________ (play) basketball on the playground.have beenhaveheard has workedwere washedto playis playingExercise
