《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: Present Progressive
定義：表示說話時(瞬間)正在進(jìn)行的動作, 也表示目前或現(xiàn)階段正在進(jìn)行的動作。
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. 表示過去常常做某事, 而現(xiàn) 在往往不做了, 后接動詞原形。
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.
被動語態(tài)：Passive voice
定義：表示主語是動作的承受者，即行為動作的對象的一種語態(tài)。
結(jié)構(gòu)：be + 過去分詞
e.g. A new school was built last year.
Our classroom is cleaned every day.
... ... ...
情態(tài)動詞
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。
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(dá)更加客氣、委婉的語氣。
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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