1、Unit 13 We are trying to save the earth.Section A Grammar Focus-4c 學(xué)習(xí)目標1.掌握重點生詞、短語、句子。生詞：cruel, industry, law, scientific, reusable短語：be harmful to, take part in, afford to do sth.,turn off, pay for, at the top of, take action句子：1. Were trying to save the earth! 2. But it used to be so clean! 2. 熟練運

2、用現(xiàn)在進行時、used to do結(jié)構(gòu)、被動語態(tài)以 及現(xiàn)在完成時。 3. 樹立保護鯊魚、尊重自然的意識。新課導(dǎo)入How many tenses(時態(tài)) and voices（語態(tài)） have we learned? What are they?新課講解Read the following sentences. Were trying to save the earth.The river used to be so clean.The air is badly polluted.No scientific studies have shown that shark fins are good

3、for health.We should help save the sharks. Grammar Focus新課講解一、現(xiàn)在進行時表示現(xiàn)在正在進行的動作, 也表示現(xiàn)階段或當前一段時間內(nèi)正在進行的動作。am/is/are + 動詞-ing look, listen, now用法：結(jié)構(gòu)：標志詞：Look! The children are playing basketball on the playground.看！孩子們正在操場上打籃球。新課講解助記現(xiàn)在進行時現(xiàn)在進行時，構(gòu)成“am/is/are+動詞-ing”要牢記。look, listen是標志，now也是常見詞。若問be用何形式，須看主

4、語人稱、數(shù)。一般問句be提前，否定be后not立。新課講解二、used to do sth.與be used to doing sth.used to do sth. 表示過去常常做某事, 而現(xiàn)在往往不做了。be used to doing sth. 表示習(xí)慣于做某事。I used to get up at eight oclock.我過去常常8點起床。Joe is used to drinking a cup of milk for breakfast.喬習(xí)慣于早飯喝杯牛奶。 新課講解Fill in the blanks with the appropriate modal verbs fr

5、om 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 theearth begins with small things. may/mightmust/ have to4b新課講解For example, you _ save electricity by turning off the lights when you leave a room. You _ also u

6、se reusable bags instead of plastic bags. can would could have to should must may/ mightcan/ could/ shouldcould/ can/ should關(guān)閉可重復(fù)使用的新課講解I think its 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 its far, you

7、 _ take the bus. can would could have to should must may/ mighthave to can/should/ couldcan/could支付新課講解All these small things _ add up and become big things that _ improvethe environment. Lets take action now!can would could have to should must may/ mightcan/ couldwould/can/ could新課講解use public tran

8、sportation turn off the lights when you leave a room; use reusable bags instead of plastic bags; ride bikes or walk to school or work;recycle books and paperMake a list of things that people can do to help the environment and discuss your list with your partner.交通運輸4c新課講解I think that everyone should

9、 use public transportation.I disagree. Its difficult for parents with young children to use public transportation新課講解My friend Ken is thinking about making a poster about shark protection. Please help him. You can work in groups. 當堂小練一、用括號內(nèi)所給動詞的適當形式填空1. You mustnt _ (play) with the knife, or you may

10、 _ (hurt) yourself.2. Today, smartphones are really helpful. They _ (use) everywhere.3. My aunt _ (work) as a nurse for 10 years. She is good with different patients.play hurt are used has worked當堂小練二、單項選擇11. Shared bikes, which are environmentally friendly _ quite popular among big cities in Chin a since last April. A. became B. have become C. will become【解析】句意：自去年四月份以來，有利于環(huán)保的共享單車在中國的大城市相當受歡迎。根據(jù)時間狀語“since過去的時間點”可知要用完成時態(tài)。故選B。B當堂小練12. How are you today?Oh, I _ as ill as I do now for a long time. 武漢A. didnt feel B. wasnt feelingC. dont feel D. havent felt18. Who was the book _?A. write B. wrot