《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!

... ... ...

現(xiàn)在進行時

（1）含義：①表示現(xiàn)在正在進行的動作。②表示現(xiàn)階段一直進行的動作。 ? ? ? ? ?

（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：

①一般情況下在動詞詞尾加-ing。如：go--going。

②以不發(fā)音的字母e結(jié)尾的動詞，去掉e加-ing。如: have--having。

③以一個輔音字母結(jié)尾的重讀閉音節(jié)，雙寫最后一個字母，再加-ing。如：stop--stopping。

... ... ...

現(xiàn)在完成時

（1）含義：

①表示過去發(fā)生的動作，對現(xiàn)在造成的影響。

②表示過去發(fā)生的動作或存在的狀態(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+時間段, ? ? ? ?since+時間點/從句，

in the past + 時間名詞， ? ?

in the last +時間名詞。

（4）過去分詞的構(gòu)成：

①一般情況下在動詞詞尾加-ed。如：work--worked。

②以e結(jié)尾的動詞后只加-d。如：close--closed。

③以輔音字母+y結(jié)尾的動詞，應(yīng)將y改為i再加ed。如：study--studied。

④以重讀閉音節(jié)結(jié)尾的動詞，要雙寫末尾的輔音字母再加-ed。如：stop--stopped。

⑤不規(guī)則動詞的過去分詞：AAA型；AAB型；ABA型；ABB型；ABC型。?

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被動語態(tài)

初中階段我們學(xué)習(xí)了8種被動結(jié)構(gòu)，歸納如下：

（1）一般現(xiàn)在時的被動式：am / is / are + 過去分詞

（2）現(xiàn)在完成時的被動式：have / has + been + 過去分詞

（3）現(xiàn)在進行時的被動式：am/ is/ are + being + 過去分詞

（4）一般過去時的被動式：was / were + 過去分詞

（5）過去進行時的被動式：was / were + being + 過去分詞

（6）過去完成時的被動式：had + been + 過去分詞

（7）一般將來時的被動式：will / be going to be+ 過去分詞

（8）含有情態(tài)動詞的被動式：情態(tài)動詞+be +動詞的過去分詞。

... ... ...

情態(tài)動詞練習(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

... ... ...

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.?

用括號里所給動詞的正確形式填空

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).

... ... ...

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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