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(共16张PPT)
Unit 8
It must belong to Carla.
第三课时 Section A（Grammar Focus~4c）
She could be reading books.
Play a guessing game
What is she doing
She can’t be reading books. She might be doing her homework.
She could be playing computer games.
Warm-up
Where is it
What is he doing
Li Lei
Whose English book is this
What kind of animal is it
Whose volleyball is this It must be Carla’s. She loves volleyball.
Whose hair band is this It could be Mei’s hair band. Or it might belong to Linda. They both have long hair.
What did you see that night I’m not sure, but it can’t be a dog. It was bigger. I think it might be a bear or a wolf.
Grammar Focus
Presentation
语法小知识——情态动词表推测
句式 情态动词 用法 意义 例句
肯定句 must 表示有把握的肯定推测 一定； 肯定 Miller must be very tired after a long journey.
could/may/ might 其肯定程度逐渐减弱，表示把握不大的推测 可能
It might rain this afternoon.
否定句 can't 表示有把握的否定推测 不可能 Amy can't be at school. It's Sunday today.
疑问句 can/ could 表示推测 可能 Can Peter still be alive after so many years
不同的形式表示不同的时态：
结构形式 用法 例句
情态动词 + 动词原形 表示对现在的事情的推测 Something must be wrong with my bike.
情态动词 + be + 动词的-ing形式 表示对正在发生的事情的推测 My brother might be having breakfast at home.
情态动词 + have + 动词的过去分词 表示对过去或已经完成的事情的推测 I must have put my keys
somewhere in the bedroom.
1. A: Where’s Jean？
B: I’m not sure. She________ (is/might be/must be) in the laboratory.
2.A: Everyone is going to the pool after school.
B: Really It ________ (must be/can’t be/could be) hot outdoors.
3. A: That’s the phone.
B: Hmm. I wonder who it_________(must be/could be/should be).
4. A: I wonder if these are Jim’s glasses.
B: They________(can’t be/might be/could be) his. He doesn’t wear glasses.
5. A: I hear water running in the bathroom.
B: It _________________(could be/must be/can’t be) Carla. She was thinking of taking a shower.
might be
Choose the best way to complete each sentence using the words in brackets.
must be
could be
can’t be
must be/could be
Practice
4a
1. A: Many people are wearing coats.
B: The weather must be _________.
2. A: Sally has been coughing a lot.
B: She might be_____________.
3. A: This restaurant is always very crowded.
B: The food________________.
4. A: Whenever I try to read this book, I feel sleepy.
B: It can’t _____________.
very cold
having a cold
must be delicious
be interesting
Complete these responses.
4b
Look at this picture of a room. How much can you tell about the person who lives here Is it a boy or a girl What are his / her hobbies Discuss your ideas with a partner.
Sample Dialogue
A: It could be a girl’s room because it’s very tidy.
B: I guess so . But it might be a boy’s room because the clothes look like boys’ clothes.
4c
辨析sleep, sleepy & asleep
单词 词性 含义 用法 例句
sleep 名词 睡眠 不可数名词 Just lie down and get enough sleep.
一次睡眠；一段睡眠时间 前可加a I’ll go upstairs and have a sleep.
动词 睡觉；睡 不及物动词 Did you sleep well last night
Language points
单词 词性 含义 用法 例句
sleepy 形容词 困倦的；瞌睡的 既能作定语，也能作表语 Do you know the sleepy girl
I’m too sleepy to finish my report.
asleep 形容词 睡着的 通常作表语；常和be或fall搭配使用 If I am asleep on the bus, please wake me up when you get off the bus.
1. 表示推测的情态动词：
在英语中，表示对某件事物的确定程度，即表示推测的时候，我们通常会用到以下情态动词 must, can, could, might。
★情态动词 must, can, could, might 后接动词原形，表示对现在情况的推测。
2. 用法：
①“情态动词 + 动词原形”表示对现在或将来的情况进行推测。
②“情态动词 + be + v-ing形式”表示对正在进行的情况进行推测。
③“情态动词 + have + v-ed”表示对过去的情况进行推测。
Summary
1. — Is this book Linda's
— It _____ be hers. Sandy's name is on the cover.
A. can't B. mustn't C. needn't D. must
2. —Is that woman in the lab Ms Jones
—No. It ______ be her. She has gone to the museum.
A. can't B. can C. mustn't D. must
3. The magazine ________ Lucy's. We can see her name on the cover.
A. mustn't be B. can't be C. must be D. needn't be
A
A
C
Exercises
单项选择
4. You _____ be very tired with the long drive. Let's stop to have a rest.
A.must B. can
C. shall D.need
5. —Look, the man welcoming us at the school gate______ our headmaster.
—No, it ______ be him. He is having a meeing in the office now.
A. must; can't B. must; mustn't
C. can't; mustn't D. mustn't; can
A
A
Homework
1. Review Grammar.
2. Finish Activity 4c.
3. Preview Section B 1a-1d.

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