《We're trying to save the earth!》PPT課件3
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 affort to _____ (wait) any longer to take action!
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現(xiàn)在進(jìn)行時(shí)
（1）含義：①表示現(xiàn)在正在進(jìn)行的動(dòng)作。②表示現(xiàn)階段一直進(jìn)行的動(dòng)作。
（2）基本結(jié)構(gòu)：am/ is/are + 現(xiàn)在分詞
（3）標(biāo)志詞：now, right now, Look, Listen at present, this week, these days
（4）現(xiàn)在分詞的構(gòu)成：
①一般情況下在動(dòng)詞詞尾加-ing。如：go--going。
②以不發(fā)音的字母e結(jié)尾的動(dòng)詞，去掉e加-ing。如: have--having。
③以一個(gè)輔音字母結(jié)尾的重讀閉音節(jié)，雙寫最后一個(gè)字母，再加-ing。如：stop--stopping。
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現(xiàn)在完成時(shí)
（1）含義：
①表示過去發(fā)生的動(dòng)作，對(duì)現(xiàn)在造成的影響。
②表示過去發(fā)生的動(dòng)作或存在的狀態(tài)一直延續(xù)到現(xiàn)在，還可能繼續(xù)下去。
（2）基本結(jié)構(gòu)：have / has + 過去分詞
（3）標(biāo)志詞：already, yet, ever, never, once, twice, recently, so far,
for+時(shí)間段, since+時(shí)間點(diǎn)/從句，
in the past + 時(shí)間名詞，
in the last +時(shí)間名詞。
（4）過去分詞的構(gòu)成：
①一般情況下在動(dòng)詞詞尾加-ed。如：work--worked。
②以e結(jié)尾的動(dòng)詞后只加-d。如：close--closed。
③以輔音字母+y結(jié)尾的動(dòng)詞，應(yīng)將y改為i再加ed。如：study--studied。
④以重讀閉音節(jié)結(jié)尾的動(dòng)詞，要雙寫末尾的輔音字母再加-ed。如：stop--stopped。
⑤不規(guī)則動(dòng)詞的過去分詞：AAA型；AAB型；ABA型；ABB型；ABC型。
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被動(dòng)語態(tài)
初中階段我們學(xué)習(xí)了8種被動(dòng)結(jié)構(gòu)，歸納如下：
（1）一般現(xiàn)在時(shí)的被動(dòng)式：am / is / are + 過去分詞
（2）現(xiàn)在完成時(shí)的被動(dòng)式：have / has + been + 過去分詞
（3）現(xiàn)在進(jìn)行時(shí)的被動(dòng)式：am/ is/ are + being + 過去分詞
（4）一般過去時(shí)的被動(dòng)式：was / were + 過去分詞
（5）過去進(jìn)行時(shí)的被動(dòng)式：was / were + being + 過去分詞
（6）過去完成時(shí)的被動(dòng)式：had + been + 過去分詞
（7）一般將來時(shí)的被動(dòng)式：will / be going to be+ 過去分詞
（8）含有情態(tài)動(dòng)詞的被動(dòng)式：情態(tài)動(dòng)詞+be +動(dòng)詞的過去分詞。
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情態(tài)動(dòng)詞練習(xí)
1.-- ____ you pass me a pen? I'd like to write down the phone number.
-- Sure. Here it is.
A.Can B.Need C.Might D.Must
2. -- May I go to the cinema, Mum?
-- Certainly, but you ___ be back by 11 o'clock.
A.can B.may C.must D. need
3. you ___ worry about me. It's nothing serious.
A.can't B.mustn't C. needn't D. won't
4. -- Excause me. Is this the right way to the Summer Palace?
-- Sorry, I'm not sure. but it ____ be.
A.might B.mustn't
C.can't D.must
5. The man in the office ____ be Mr.Black, because he went home just now.
A.musn't B.may not
C.can't D.needn't
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I. 用所給詞的適當(dāng)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.
用括號(hào)里所給動(dòng)詞的正確形式填空
1. The girl ___________(dance) in the classroom.
2. It's 5 o'clock now. Mike _________ (have)dinner.
3. --_____ you ever ____ (be) to the US?
-- Yes, twice.
4. -- May I speak to John?
-- Sorry, he __________(go) to New York. he will be back in two days.
5. --Did you go to Jack's birthday?
-- No,I ______________(not invite).
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Fill in the blanks with the appropriate modal verbs from the box.
can could would have to should must may/might
People _____ think that big things _____ be done. However, 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 paper or reusable bags instead of plastic bags.
Homework
write an article to show in what way we students can protect the environment.
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