《We're trying to save the earth!》PPT課件5
Grammar Focus
Pay attention to the sentences.
1. We’re trying to save the earth.
2. The river used to be so clean.
3. The air is badly polluted.
4. No scientific studies have shown that shark fins are good for health.
5. We should help save the sharks.
現(xiàn)在進(jìn)行時(shí): Present Progressive
定義：表示說(shuō)話時(shí)(瞬間)正在進(jìn)行的動(dòng)作, 也表示目前或現(xiàn)階段正在進(jìn)行的動(dòng)作。
結(jié)構(gòu): be (am/is/are) + v.-ing
標(biāo)志詞：Look, Listen, now, right now…
e.g. Look! The boy is crying.
... ... ...
Exercise
What a fine day today!
Look! What are they doing?
used to do與be used to doing
used to do sth. 表示過(guò)去常常做某事, 而現(xiàn) 在往往不做了, 后接動(dòng)詞原形。
be used to doing sth. 表示習(xí)慣于做某事
e.g. I used to get up at six o’clock.
Joe is used to drinking a cup of coffee every morning.
... ... ...
Translation.
1. 她過(guò)去常常周末和朋友閑逛。
She used to hang out with friends on weekends.
2. 他習(xí)慣于每天晚上睡得很晚。
He is used to staying up.
被動(dòng)語(yǔ)態(tài)：Passive voice
定義：表示主語(yǔ)是動(dòng)作的承受者，即行為動(dòng)作的對(duì)象的一種語(yǔ)態(tài)。
結(jié)構(gòu)：be + 過(guò)去分詞
e.g. A new school was built last year.
Our classroom is cleaned every day.
... ... ...
情態(tài)動(dòng)詞
1. 情態(tài)動(dòng)詞本身有一定的詞義, 表示說(shuō)話人的情緒、態(tài)度或語(yǔ)氣, 但不能單獨(dú)作謂語(yǔ), 只能與其他動(dòng)詞構(gòu)成謂語(yǔ)。常見(jiàn)的有: can (could), may (might), must, need, shall (should), will (would)等。
2. 情態(tài)動(dòng)詞無(wú)人稱和數(shù)的變化, 后接動(dòng)詞原形。否定式是在情態(tài)動(dòng)詞后面加not。個(gè)別情態(tài)動(dòng)詞有過(guò)去式形式, 可用來(lái)表達(dá)更加客氣、委婉的語(yǔ)氣。
e.g. Ken can climb up the tress like a koala.
Tracy could ride a bicycle when she was five years old.
You mustn’t play with fire. It is dangerous.
... ... ...
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(yùn)輸);
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(餐巾紙);
recycle books and paper
... ... ...
Homework
Write 5 measures to protect the environment.
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