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(共28张PPT)
Unit 4
Modals (2)
must, can, may, might等表推测
能够通过观察并总结must, may, can表达推测的用法，并正确使用。
能够使用所学，谈论助人情景和提供帮助的表达。
Read the sentences from the reading passage and summarise the grammar rules.
Well, crayons may carry viruses and spread diseases.
(b) It can be boring to wait for X-rays and treatments.
(c) There must be something for me to do.
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Now find more sentences with these structures in the reading passage.
It might sound impossible, but Leah didn’t give up.
情态动词表推测
情态动词must, can, could, may, might 均可表示推测，它们可以对过去、现在或将来的情况进行推测。
Must 通常只用于肯定句，意为“一定，准是，肯定”。
e.g. The light is off. He must be sleeping.
That shop must be very good. Many people buy things there every day.
can多用于否定句或疑问句中。could 可用于各种句式。用于疑问句时，can比could表示的可能性要大；
用于否定句时，cannot (can’t)表示“不可能”。
could则可用于肯定句、否定句和疑问句。
e.g. The door is locked. He can’t be at home.
Can the news be true
There could be life on some of the planets.
may / might用于肯定句和否定句中。
在表示现在或将来的可能情况时，might表示的可能性比 may表示的可能性要小一些。
e.g. They may not know his address. I’m not sure about that.
She told me that she might go to Hawaii this winter.
确定的推测 不确定的推测 (可能性依次减弱)
肯定句 must can > could > may > might
否定句 can not could not > may not > might not
疑问句 can could
1. That man _________(must / can’t) be Mr Hand. Mr Hand is much shorter.
2. The basketball _________(must / could) be Mike’s or Jim’s. They both like playing basketball.
3. Our English teacher _________(must / can’t) be working now, because the light in her office is still on.
4. —What will the weather be like tomorrow
—It _________(must / might) be windy or rainy. I’m not sure.
can’t
could
从括号内选择合适的单词完成下列句子或对话。
must
might
Complete the sentences with must, may or can.
You _____ be thirsty now after the long run. Here is a bottle of water for you.
You didn’t bring an umbrella Take mine. It _____ rain later.
Here is my notebook. You _______ return it after the exam.
must
may
may/can
6
Look at the pictures and complete the dialogues with the correct form of the modal verbs.
A: Look at that man! It _____ be hard for him to carry all the boxes!
B: Let’s give him a hand.
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must
Dialogue 1
A: Is that Lily over there
B: It _______ be her. She has the flu and has to stay at home.
A: That’s too bad. The lesson today is really important.
B: Don’t worry. We _______ share our notes
with her.
can’t
can
A: That woman looks lost. She ______ need help.
B: Yes. We _______ go and ask her.
Dialogue 2
Dialogue 3
may
can
Choose a dialogue and role-play.
A: Look at that man! It _____ be hard for him to carry all the boxes!
B: Let’s give him a hand.
must
Dialogue 1
A: That woman looks lost. She ______ need help.
B: Yes. We _______ go and ask her.
Dialogue 2
may
can
A: Is that Lily over there
B: It _______ be her. She has the flu and has to stay at home.
A: That’s too bad. The lesson today is really important.
B: Don’t worry. We _______ share our notes with her.
can’t
can
Dialogue 3
Discuss in groups and answer the questions.
Do you think it takes a lot of effort to help people around us What can you learn from Leah’s story and these dialogue
No, it doesn’t take a lot of effort to help people around us. From Leah’s story and these dialogues, we can learn that even a small act of kindness can make a big difference to others and bring them joy and support.
Create a dialogue and role-play. Remember to use correct modal verbs.
A: Our community needs volunteers. How about signing up
B: Good idea! What can we do to help
A: We could clean the streets to make the community tidier. We may also help the elderly cross the road safely.
B: Sounds great! The community must become tidier! And the elderly may feel cared for, too!
Work in pairs. Discuss things to do to help people around you. Use the words and expressions from the reading passage and the Useful expressions to help you.
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Who need your help
Why do they need help
What can you do to help
A helping hand
How can we help people around us
... may find it a challenge to …
... help... get through ...
... need a helping hand.
There must be something for me to do, such as …
Perhaps I can / could ...
A: Do you have time after school today
B: Yes, I do. What's up
A: Well, it's about Lin Peng. He needs some help with his homework.
B: What's the matter
A: He finds it a challenge to prepare the English presentation. He may also feel nervous about it. Perhaps we could help him find some material.
B: No problem. And we can also help him practise public speaking.
A: OK, then. I'll let him know. He must feel happy with our help.
Ⅰ. 从选项中选择可以填入空白处的最佳答案。
( )1. He ______ know the secret. I haven't told anyone about it.
A. can't B. needn't C. mustn't
( )2. —I've heard Lucy will join the art club.
—It _____ be true. She's already in the basketball club. We can only choose one.
A. should B. can't C. must
A
B
( )3. Don't go any closer to that dog! It _____ be dangerous. You know, dogs can be crazy sometimes.
A. mustn't B. might C. can't D. need
( )4. —You _____ have the wrong number. There's no one by that name here.
—Really Let me check it again.
A. should B. need C. must D. can
( )5. —Is John coming by train
—He should, but he _____. He likes driving his car.
A. mustn't B. can't C. shouldn't D. may not
B
C
D
1. Lin Xiao ___________ be at home now, for I saw her entering the bookstore just now.
2. I believe the photos ___________ be Amy's. Those are her parents.
3. The actor __________ be that famous. I've never heard his name before.
Ⅱ. 选择恰当的情态动词填空（可重复使用）。
must, may, might, could, can't
can't
must
can’t
4. There are some grey clouds in the sky. It __________________ rain today, but I'm not sure.
5. —Listen! Helen is singing in the music room.
—It ____________ be Helen. She has gone to Shanghai.
6. According to the locals, even an experienced climber _________________ get into trouble if he or she climbs the mountain alone.
must, may, might, could, can't
may/might/could
can't
may/might/could
7. Be careful with that knife! You ________________ get hurt.
8. —Whose jacket is that Is it Jeff 's
—No, it _____________ be his. It's too small for him.
9. —Where's Cindy
—I'm not sure. She _________________ be reading a book in her study.
10. The sun is shining brightly, so it _____________ be a perfectly clear day today.
must, may, might, could, can't
may/might/could
can't
may/might/could
must
I CAN
理解must, may, can表达推测的用法，并正确使用
谈论助人情景和提供帮助的表达
Find out all the sentences with modals in the passage and understand them.
Preview the next part:
Developing ideas.

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