文档内容
Unit 13 We’re trying to save the earth
【学习目标】
(一) 知识与技能
1. To learn different forms of verb.
2. To understand the use of Modal Verbs.
(二) 过程和方法
3. To know how to use different forms of verb in different situations.
4. To know how to use Modal Verbs in different situations.
(三) 情感态度和价值观
5. After learning this part, every student will be able to describe their
awareness of the serious situation of pullution and solutions to
environmental problems using what we have learned in this lesson.
【自主梳理】
1. 判断下列句子中使用了什么时态及情态动词。
1. We are trying to save the earth.
2. The river used to be so clean.
3. It was considered the nicest river in the town.
4. The air has become really polluted.\
5. We should help savew the sharks.
2. presentation
1) verb forms
现在时 过去时 将来时 过去将来时
[来源:Zxxk.Com]
主动语态 should/would
ask / asks asked shall/will ask
ask
一
般
[来源:学被动语态 was/were shall/will be should/would be
科网] am/is/are asked
asked asked asked
主动语态 was/were
am/is/are asking
进 asking
行
被动语态
主动语态 have/has asked had asked
完
成 被动语态 have/has been had been
asked asked
2) Modal verbs.
Main function of Modal Verbs.
①. can (could) 表示能力，could主要指过去时间；表示允许。②. may表允许，might可以指过去时间，也可指现在时间，语气更委婉。
③. must表示义务。意为“必须”（主观意志）
④. shall表征询意见
⑤. will表意愿，用于各种人称陈述句；表请求，用于疑问句。
⑥. should / ought to应该
【重点领悟】
1) Fill in blanks with the correct forms of verbs.
Interviewer: ___________ 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).
Interviewer: How many people __________ (take ) part?
Ken: I ________ ( think) more than 1,000 people ________ (come) to help
out.
Interviewer: That’s fantastic! I guess everyone in this city is ____________
(try) to improve the environment.
Ken: Yes, evertone should _____________(play ) a part in keeping the city
clean.
Possible answers: Have taken, helped, considered, had had, took, think, came,
trying., play
2) Fill in blanks with proper modal verbs.
Can would could have to should might/may must
When it comes to saving the earth, 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. In some stores, you now __________ pay for plastic bags. I think
this is a great idea. And instead of driving to school or work, you ________
ride your bike or walk. If it’s far, you ________ take the bus. All these
small things ______ add up and
【探究提升】
一．Fill in blanks using proper forms of given words.
1、I'll give the book to him as soon as he _______ back(come).
2、 ______ the baby _______ crying yet? (stop)
3、I don't know whether mother ________ me to beijing next month.(take)
4、she ________ on her coat and went out. (put)
5、 “What are they doing?” “They _______ ready for the sports
meeting.” (get)
6、The boy asked his mother ________ him go and play basketball.(let)
7、I’m sorry to keep you ________ for a long time. (wait)
8、It ______ (take) him half an hour ________ (finish) his
homework yesterday.9、If it _______ an interesting film, we’ll see it tomorrow. (be)
10、They usually _________ (do) their homework after supper.
11、Listen! who __________ (sing) in the next room now?
12、_______ (be) your parents in shanghai last year?
13、Mr. yu ________ (teach) us maths since 1982.
14、They will have a trip (旅行) to the great wall if it ________ (not rain)
tomorrow.
15、Li Ming often ________ (listen) to the radio in the morning.
二．Choose the best answers.
1．-May I stop my car here?
-No, you_＿＿＿.
A. can't B. mustn't C. needn't D. don't have to
2. -Must we clean the house now?
-No, you _______.
A. needn't B. may not C. mustn't D. can't
3. Man __die without water.
A. will B. can C. need D. shall
4. –You____ return the book now. You can keep it next week if you like.
A. can't B. mustn't C. needn't D. may not
5. -Johnny, you____ play with the knife, you___ hurt yourself.
A. won't...can't B. mustn't...may
C. shouldn't, must D. can't...shouldn't
Answers:
【自主梳理】
1. 现在进行时 2. used to 3. 一般过去时的被动语态 4. 现在完成时 5. should
【重点领悟】
1) Have taken, helped, considered, had had, took, think, came, trying., play
2) may, can’t, can, could, have to, may/might, should ,would, must
【探究提升】
1、comes 2、has, stopped
3、will take
4、put 5、are
getting 6、to let
7、waiting 8、took, to
finish 9、is
10、do 11、is
singing 12、were
13、has taught 14、doesn't rain
15、listens
AAACB
