《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(jìn)行時
（1）含義：①表示現(xiàn)在正在進(jìn)行的動作。②表示現(xiàn)階段一直進(jìn)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。
... ... ...
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(jìn)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(jìn)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.
關(guān)鍵詞：《We're trying to save the earth!》教學(xué)課件，人教版九年級下冊英語課件，九年級英語幻燈片課件下載，《We're trying to save the earth!》PPT課件下載，.ppt格式
