初中英語人教新目標 (Go for it) 版九年級全冊Unit 13 We’re trying to save the earth!Section A精品課件ppt

這是一份初中英語人教新目標 (Go for it) 版九年級全冊Unit 13 We’re trying to save the earth!Section A精品課件ppt，文件包含人教新目標版英語九年級Unit13《WeretryingtosavetheearthSectionAGrammarfocus-4c》課件pptx、人教新目標版英語九年級Unit13《WeretryingtosavetheearthSectionAGrammarfocus-4c》練習含答案doc、環(huán)境保護mp4等3份課件配套教學資源，其中PPT共37頁， 歡迎下載使用。
Unit 13 We're trying to save the earth!Period 3 SectionA Grammar focus-4c
人教新目標版英語九年級
Presentation
1.掌握下列詞匯：take part in ,afford, turn off, reusable, pay for, take action, transportation 掌握句型：We can’t afford to wait any longer to take action!Have you ever taken part in an environmental project? 2. 通過了解謂語動詞解題思路，能夠復習現(xiàn)在進行時、現(xiàn)在完成時、情態(tài)動詞、被動語態(tài)、used to的表意功能和用法。3.能運用目標語言談論污染問題，能在實際情景對話中認識解決空氣污染和垃圾污染的方法。
Learning aims
Presentation
take part in 參加 afford v. 承擔得起(后果); 買得起 turn off 關(guān)掉 reusable adj. 可重復使用的； pay for 付費； 付出代價 take action 采取行動transportation n. 運輸業(yè)；交通運輸
Pre-grammar
Look and read.
New words
Presentation
Pre-grammar
Watch and answer.
Enjoy a short video and anwer the questions.
1. What’s happening to the earth ?
2. What caused the pollution？
3. What should we do to reduce the pollution？
It is suffering from pollution.
遭受(痛苦)
People are throwing rubbish everywhere.
Factories are putting waste into the river.
The factories that burn coal pollute the air with a lot of black smoke.
Lead in
Presentation
Pre-grammar
Look and say.
3. What should we do to reduce the pollution？
The government has taken actions.
Some laws are developed to stop the pollution.
Everyone should take part in saving the earth.
Take the bus or ride a bike instead of driving.
Presentation
Pre-grammar
Look and say.
bring a bag instead of plastic bags when shopping.
Remember to throw rubbish into the bins.
Try to put different kinds of waste into different bins.
Presentation
While-grammar
Look and translate.
Read the sentences and translate them.
Presentation
Fill in the blanks according to grammar focus.
While-grammar
1. We’re trying ______ ______ the earth.我們正在盡力地拯救地球。2. The river ______ _____ be so clean.河流過去常常是如此干凈。3. The air ____ badly ________.空氣被嚴重地污染了。4. No scientific studies ______ ____ that shark fins are good for health.沒有科學研究顯示鯊魚魚鰭對健康有益處。5. We _____ ______ save the sharks.我們應該幫助拯救鯊魚。
to save
used to
is polluted
have shown
should help
Practice
Presentation
While-grammar
探究語法規(guī)律
What did you find out?
探究一：現(xiàn)在進行時的結(jié)構(gòu)和用法
定義：表示說話時(瞬間)正在進行的動作, 也表示目前或現(xiàn)階段正在進行的動作，或說話者的強烈情感。
People are throwing rubbish to the river.
Presentation
While-grammar
探究語法規(guī)律
探究一：現(xiàn)在進行時的結(jié)構(gòu)和用法
定義：表示說話時(瞬間)正在進行的動作, 也表示目前或現(xiàn)階段正在進行的動作，或說話者的強烈情感。
They are playing basketball now.
Tom is working on a new book about stories.
正在發(fā)生
目前一段時間內(nèi)正在進行
謂語構(gòu)成：Be(am\is\are) ＋v-ing (動詞的現(xiàn)在分詞)
It’s always raining here.
說話者的強烈情感（抱怨情緒
Why are you always coming late for class?
含說話者的強烈情感
He is watching a movie now.
I am studying Chinese on the Internet these days.
Factories are putting waste into the river.
Presentation
While-grammar
探究語法規(guī)律
探究一：現(xiàn)在進行時的結(jié)構(gòu)和用法
句式變化：① 肯定句: 主語 + am/is/are + v-ing ② 否定句: 主語 + am/is/are + not + v-ing ③ 疑問句: Am/Is/Are + 主語 + v-ing?
Is she reading a book now?
She is not reading a book now.
She is reading a book now.
v.-ing形式(現(xiàn)在分詞)的構(gòu)成：
a.一般情況下，在動詞詞尾后加-ing。如：go → going。b.以不發(fā)音的e結(jié)尾的動詞，去掉e加-ing。如：have → having。c.以重讀閉音節(jié)結(jié)尾的動詞，末尾只有一個輔音字母，雙寫這個輔音字母，再加-ing。如：run → running。
Presentation
While-grammar
探究語法規(guī)律
探究一：現(xiàn)在進行時的結(jié)構(gòu)和用法
標志性詞匯：now, right now, look, listen, these days, at the moment, at present
Look! The boy is crying.
Listen! The boy is singing.
He is watching a movie now.
具體用法：
1.表示說話時正在進行的，目前正在發(fā)生的動作。 常帶有表示目前時刻的時間狀語如：now, at the (very) moment, for the time being, at present, 及Look! Listen! ...① Look! The big bird is flying away. 看，那只大鳥正在飛走。 ② He is watching a movie now. 他現(xiàn)在正在看電影。
Presentation
2.表示目前一段時間內(nèi)正在進行，但說話時可能沒有進行的動作。Right now I am studying Chinese by distance learning. 我現(xiàn)在正通過遠程教育學習漢語。
While-grammar
探究語法規(guī)律
探究一：現(xiàn)在進行時的結(jié)構(gòu)和用法
具體用法：
3. 與always, constantly, forever, all the time等副詞連用，表示動作反復或習慣。此時句子常含有說話者的強烈情感在內(nèi)。表達較強的“責備”或“表揚”之意。① You are always changing your mind. 你總是主意不定(太煩人了。) ② He is always helping others. 他總是幫助別人。(他真是個好人。)
4. 對于come, go, leave, arrive, start 等表示位置移動的動詞常可用進行時態(tài)表將來。① He is leaving on Wednesday. 他將于周三離開。 ② Mary isn’t here at the moment. She is coming later. 瑪麗現(xiàn)在不在這兒，她一會兒來。
Presentation
While-grammar
Look and say.
用括號內(nèi)所給動詞的適當形式填空。 Listen! The phone __________(ring). Please go to answer it.2. — Alan, it’s late. Why not go to bed? — Jenny hasn’t come back yet. I ___________(wait) for her. 3. — What’s your father doing now? — He __________ (write) a letter in the study.
is ringing
am waiting
is writing
Group discussion
What a fine day today! Look! What are they doing?
Practice
Presentation
While-grammar
探究語法規(guī)律
What did you find out?
探究二：used to的結(jié)構(gòu)和用法
1. used to 是固定結(jié)構(gòu)，是一般過去時的一種形式，后面跟___________. used to do 意為“__________”. 表示過去的習慣動作或狀態(tài)，現(xiàn)在已不發(fā)生或不存在。 可使用于各種人稱。
動詞原形
過去常常做
Did you use to play the piano?
Presentation
While-grammar
探究語法規(guī)律
探究二：used to的結(jié)構(gòu)和用法
sb.used to do sth. 某人過去常常做某事(現(xiàn)在不再做了) I used to get up at six o’clock. 我以前六點鐘起床。used to be + adj. 過去曾經(jīng)……樣The river used to be very clean.used to be + 職業(yè)名詞 過去曾經(jīng)當過/是… His father used to be a teacher.
2. used to 的句型變化
1) 否定句式：didn’t use to do sth. e.g. You didn’t use to eat chips when you were younger. 2) 一般疑問句式：Did + 主語 + use to do sth.? Did you use to play the piano? 3) 附加疑問句式： …, didn’t +主語? He used to drink, didn’t he?
Presentation
While-grammar
探究語法規(guī)律
探究二：used to的結(jié)構(gòu)和用法
3. 辨析：used to do sth.; be/get used to doing sth.; be used to do sth.
used to do sth. 意為“過去常常做某事(而現(xiàn)在不做了)”。后接動詞原形。 I used to eat pork.
be/get used to doing sth. 意為“習慣于(做)某事”。后接動詞使用-ing形式。I’m used to riding to school now.
be used to do sth. 意為“被用來做某事”。這是被動結(jié)構(gòu)，后接動詞原形。Wood can be used to make paper.
My grandfather is used to going for a walk after dinner. 我爺爺習慣晚飯后去散步。
這種小刀是用來切東西的。This kind of knife are used to cut things.
Presentation
While-grammar
探究語法規(guī)律
What did you find out?
探究三：被動語態(tài)的結(jié)構(gòu)和用法
1. 定義：主動語態(tài)表示主語是動作的執(zhí)行者。被動語態(tài)表示主語是動作的承受者，即行為動作的對象。2. 結(jié)構(gòu)：be + 過去分詞 e.g. A new school was built last year. Our classroom is cleaned every day.
Presentation
While-grammar
探究語法規(guī)律
探究三：被動語態(tài)的結(jié)構(gòu)和用法
3. 主動語態(tài)如何變?yōu)楸粍诱Z態(tài)
小口訣： 賓變主，主變by+賓，謂語動詞用被動（be+done）,其他成分不變。
①
①
②
③
I cleaned my room. → My room was cleaned by me.
主動語態(tài)中有些感官動詞（如hear, see, watch, notice等）和使役動詞（如make, let等）后用不帶to的不定式作賓語補足語，變?yōu)楸粍诱Z態(tài)時，要把不定式符號to還原。
I saw him cross the road and enter the shop. → He was seen to cross the road and enter the shop.
Presentation
While-grammar
探究語法規(guī)律
探究三：被動語態(tài)的結(jié)構(gòu)和用法
5. 各種時態(tài)的被動語態(tài)謂語構(gòu)成
不同時態(tài)的被動語態(tài)結(jié)構(gòu)(以動詞do為例):一般現(xiàn)在時: am/is/are+ done一般過去時: was/were+done一般將來時: will be/is(/am/are) going to be+ done含情態(tài)動詞: can/may/must...+be+done
被動語態(tài)的基本結(jié)構(gòu)：助動詞be + 及物動詞的過去分詞
The Secondary School Entrance Exam _______ (hold) in June.
is held
A strange noise __________ (hear) by his mother last night.
was heard
A wide road _____________ (build) between the two villages
will be built
Actions should_________(take) to protect the earth.
be taken
a. 講話者不知道動作的執(zhí)行者，不必或不便說出動作的執(zhí)行者（這時可 省掉by引導的短語）;b. 借助被動的動作突出動作的承受者
A new school was built last year.
Tea plants are grown in South China.
4. 被動語態(tài)用法:
Presentation
While-grammar
探究語法規(guī)律
What did you find out?
探究四：現(xiàn)在完成時的結(jié)構(gòu)和用法
1.定義：表示現(xiàn)在還存在過去發(fā)生或已經(jīng)完成的動作的影響或結(jié)果; 或者表示從過去某一時間開始一直延續(xù)到現(xiàn)在并還可能持續(xù)下去的動作。
Presentation
While-grammar
探究語法規(guī)律
探究三：被動語態(tài)的結(jié)構(gòu)和用法
2. 結(jié)構(gòu): has/have + 過去分詞
3. 標志詞: already, yet, ever, never, just, before, once, twice, recently,up to now, till now, so far, for+時間, since+時間點/從句, in the last/past...years。
I haven’t finished my homework yet.
I have already finished reading the book. 我已經(jīng)讀完這本書了。
He hasn’t called since he went to Beijing.他自從去了北京還沒有打來過電話。
He has kept this book for two weeks. 他借這本書兩周了。
Her grandfather has been dead for ten years.
In the past few years, great changes has taken place in Lianyungang.
Presentation
While-grammar
探究語法規(guī)律
探究四：現(xiàn)在完成時的結(jié)構(gòu)和用法
4. 現(xiàn)在完成時的句式結(jié)構(gòu): 主語+have / has（助動詞）+ done肯定句：主語 + have / has + done+ 其他否定句：主語 + haven’t / hasn’t + done + 其他一般疑問句： Have / Has + 主語 + done+ …？肯定答語：Yes, 主語 + have / has.否定答語：No, 主語 + haven’t / hasn’t.
5. 過去分詞的構(gòu)成
一般情況下，在動詞后加-ed。如: work → worked。在以e結(jié)尾的動詞后只加-d。如: close → closed。以輔音字母加y結(jié)尾的動詞，應將y改為i再加-ed。如: study → studied。以重讀閉音節(jié)結(jié)尾的動詞，要雙寫末尾的輔音字母再加-ed。如: stop → stopped。
過去分詞的規(guī)則變化
Presentation
While-grammar
探究語法規(guī)律
探究四：現(xiàn)在完成時的結(jié)構(gòu)和用法
5. 過去分詞的構(gòu)成
過去分詞的不規(guī)則變化
AAA型 put put putAAB型 beat beat beatenABA型 become became becomeABB型 get got got/gottenABC型 begin began begun
6. 辨析：have been to, have gone to & have been in
have / has been to “曾經(jīng)去過某地”, 現(xiàn)在已經(jīng)不在那里了。一般與表示頻率的副詞或次數(shù)連用。
I have been to Beijing twice.我去過北京兩次了。(已經(jīng)回來)
Have you been to Beijing before?
Presentation
While-grammar
探究語法規(guī)律
探究四：現(xiàn)在完成時的結(jié)構(gòu)和用法
6. 辨析：have been to, have gone to & have been in
have / has gone to “到某地去了”, 表示到了某地或正在去某地的途中, 即說話時該人不在現(xiàn)場,
My mom has gone to the supermarket.我的媽媽去超市了。(人不在現(xiàn)場)
Jim has gone to London with his family.
have been in 已在某地, 常與表示一段時間的狀語連用。
The Greens have been in China for two years.
I have been in Beijing for two years.
Presentation
While-grammar
Look and fill
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. 4. The twins ____________ (wash) the clothes for an hour.5. He ___________ (play) basketball since three years ago.6. How long ______ Sally _______ (sing) yet?
have been
have
heard
has worked
have washed
has played
has
sung
Presentation
While-grammar
探究語法規(guī)律
What did you find out?
探究五：情態(tài)動詞的結(jié)構(gòu)和用法
1. 情態(tài)動詞本身有一定的詞義, 表示說話人的情緒、態(tài)度或語氣, 但不能單獨作謂語, 只能與其他動詞構(gòu)成謂語。常見的有: can (could), may (might),must, need, shall (should), will (would)等。
Presentation
While-grammar
探究語法規(guī)律
探究五：情態(tài)動詞的結(jié)構(gòu)和用法
2. 情態(tài)動詞無人稱和數(shù)的變化，后接動詞原形。否定式是在情態(tài)動詞后面加not。個別情態(tài)動詞有過去式形式，可用來表達更加客氣、委婉的語氣。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.
3. 情態(tài)動詞的用法
a. 表能力: can, could, be able to
情態(tài)動詞can表示“能力”時，與be able to同義，其否定形式為can’t。can 表示現(xiàn)在的能力，其過去式could表示過去的能力。
—Can your Australian friend eat with chopsticks? — Yes, but she can’t use them well.
—Could your father play golf when he was young?—No, he couldn't. But he could play table tennis.
Presentation
While-grammar
探究語法規(guī)律
探究五：情態(tài)動詞的結(jié)構(gòu)和用法
3. 情態(tài)動詞的用法
b. 表推測: might, could, may, can, must, can’t (可能性依次遞增)
might, may, can, must都可表示“推測”， may和must表“推測”常用語肯定句，can表“推測”常用于否定句和疑問句。
After a long walk, the children must be very tired now.
—I saw Lily in the supermarket this morning.—No, it can't be her. She moved to Australia the day before yesterday.
c. 表建議: shall, should, had better
You should study hard if you want to be a scientist in the future?
You had better ask your parents for advice.
Presentation
While-grammar
探究語法規(guī)律
探究五：情態(tài)動詞的結(jié)構(gòu)和用法
3. 情態(tài)動詞的用法
d. 表委婉的“請求；許可”: may, might, can, could, will, would
當“May\Can\Could I …”表示“請求；許可”時，could在表示“請求；許可”時，語氣更委婉?？隙ɑ卮鸪Ｓ谩癥es,please.”\“certainly”等，否定回答常用“No, you can’t.”等。
—May I borrow your math book? — Sure. Here you are.
—Could I watch Tv now? — Sorry. you can't.
e. 表義務: must, need, have to
I must study hard and get good grades.
must 意為“必須”，強調(diào)主觀看法。
It's raining outside. I have to stay at home.
have to 意為“不得不，必須”，強調(diào)客觀情況
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While-grammar
Look and fill
Translation.1. 我們不能在教室里吃東西。2. 首先你必須完成作業(yè)。3. 他現(xiàn)在不可能在家。4. 她一定知道這個問題的答案。
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.
Presentation
Post-grammar
4a
Look and fill
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?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!
Have
taken
helped
considered
had
had
took
think
came
trying
wait
take part in sth/doing sth 參加
afford to do sth 負擔得起
take action 采取行動
Practice
Presentation
Post-grammar
Look and fill
4b
Fill in the blanks with the appropriate modal verbs from the box.
can would could have to should must 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. 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!
may/might
should/have to/must
can/could/should
can/could/should
have to
can/could/should
can/could
can/could
would/can/could
begin with 開始于
pay for 付費；付出代價
add up 合計；加起來
Presentation
Post-grammar
Look and fill
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.交通運輸); …
I think that everyone should use public transportation.
I disagree. It’s difficult for parents with young children to use public transportation…
Presentation
Post-grammar
一、用所給詞的適當形式填空
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
Class test
Presentation
Post-grammar
二、根據(jù)所給漢語完成英語句子。1. 這條河過去很干凈。 The river _______ _______ _______ so clean.2. 我們應該幫助拯救鯊魚。 We should _______ _______ the sharks. 3. 然而，很多人忘記了拯救地球從小事做起。 However, many forget that saving the earth______ ____ small things. 4. 在很多商店，你不得不付塑料袋的費用 In some stores, you now have to ___ _____ plastic bags.5. 我們認為每個人都應該使用公共交通工具。 We think that everyone should use ________ ______.
used to be
help save
begins with
pay for
public transportation
Presentation
1. 熟記Grammar Focus 里面的句子。 2. 熟讀Section B P101對應的單詞； 預習課本P101，完成1a.
Homework