北师大版 高二 (6-7) Unit 13北师大版 高二 (6-7) Unit 13

Lesson 3

Making guesses about

People

Objectives

♠ understand how to express guesses by

using Modals for Guessing

At the end of this lesson, you’ll be able to ：

Grammar

Modals for Guessing

情态动词表示猜测

Look at the dialogue again and

complete the gaps with modal

verbs:

must, may, may not, might, can’t,

could.

1. I think my French tutor ______ know

one of them.

2. They _____ be so frightened.

3. They _____ have been separated from…

4. They ______ have gone exploring…

5. They _____ be there.

6. They _______ have any water.

might

must

may

could

can’t

may not

4. What meaning do the sentences

in in Exercise 3 express:

A. decision?

B. advice?

C. guesses?

5. Which of the modal verbs in Exercise

3 express the following?

a strong belief that something is / was

true 肯定、一定a strong belief that something is /was

not true 不可能

a possibility that something is / was t

rue 可能、也许

a possibility that something is /was n

ot true 可能不，也许不

Answers:Strong belief/true:

Strong belief/ not true:

They can’t be there.

They must be so frightened! Their

parents must be very worried.

Possibility /not true:

They may not have any water.

Possibility /true:

I think my French tutor might

know one of them. They may have

been separated from… They could

have gone exploring…

• I think my French

tutor might know

one of them.

b) unlimited

present time

6. Look at these sentences again and d

ecide what they are talking about: a),

b) or c)

•They might have

fallen behind.

a) past event•They might be

sheltering in a cave.

c) something

happening now

may /might have +PP( 过去分词 )

must have +PP( 过去分词 )

肯定句

对过去的推测

对现在的推测

must be + n. / adj.

maybe/ must be + v-ing（正在进行）

must +v.( 原形 )

can’t have + PP( 过去分词 )

can’t have been+ n. / adj.对过去的推测

对现在的推测

否定句

can’t be + n. / adj.

can’t +v.( 原形 )

can’t be doing ( 正在进行 )

7. Complete the gaps in the sentences wi

th the modal verbs. More than one answ

er is possible.

1. She goes out every weekend. She

______________ have young children.

2. He looks depressed( 沮丧的 ). He _____

_____ be having some problems.

must, can’t, may, might, might not,

could

might not / can’t

may/might/could

3. This woman looks like a scholar.

She ___________________ work at t

he university.

4. His shoes are muddy ( 沾满泥的 ).

He ______ be working in an office

all day.

may/might/could

can’t

6. He often goes abroad.

He ________________ be working fo

r the Foreign Office.

might/may/could

5. Her clothes are all very expensive.

She ________________________ be

earning a lot of money.

must/might/could/may

8. Try to guess what happened i

n the past.1. A young woman is looking at a new

ring on her finger.

She might have got married recently.

2. A mother is telling her son off. ( 责备 / 怪 )

He might have come home late.

3. A boy has a broken arm.

4. There is a lot of broken glass on the

street.

5. A man is lying asleep on a park

bench.

He might have fallen off a tree.

There might have been an accident.

He might be drunk.

6. A housewife is cheering.

7. A driver is taking a set of tool kit from the boot.

8. A girl with wet hair is traveling on

the bus.

Her husband must/might have won.

His car must have been broken down.

She might have been swimming.

9. Rewrite the sentences using modal ve

rbs and suitable verb forms may be mor

e than one correct answer.

1. I’m sure she’s relaxing in her room.

She _______________ in her room.must be relaxing

2. Perhaps the postcode was wrong,

and that’s why the letter never arrived.

The postcode _______________

wrong, and that’s why the letter

never arrived.

may/might/could have been

3. I don’t believe you failed the exam.

You _______________ the exam.can’t/couldn’t have failed

4. It’s possible that Sam doesn’t like

classical music.

Sam ____________ classical music.

5. I’m sure John is not forty-five yet.

John _______ forty-five yet.

may/might not like

can’t be

6. It is possible that he’s studying

astronomy now.

He __________________________ as

tronomy now.7. Maybe they lied to me about their

adventure.

They ______________ to me

about their adventure.

may/might/could be studyinging

may/might/could have lied

8. It’s quite probable that Bill didn’

t win the competition.

Bill _______________________ th

e competition.

can’t/couldn’t have won

Best Choice

1. ---Do you know where David is? I

couldn’t find him anywhere.

---Well. He _____ have gone far—

his coat’s still here.

A. shouldn’t B. mustn’t

C. can’t D. wouldn’t

2. ---Excuse me. Is this the right way

to the Summer Palace?

---Sorry, I am not sure. But it _____ be.

A. might B. will

C. must D. can

3. ---Tom graduated from college at

a very young age.

--- Oh, he _____ have been a very

smart boy then.

A. could B. should

C. might D. must

4. ---- I heard they went skiing in the

mountains last winter.

---- It ____ true because there was

little snow there.

A. may not be B. won’t be

C. couldn’t be D. mustn’t be

5. Jack ______ yet, otherwise he

would have telephoned me.

A. mustn’t have arrived

B. shouldn’t have arrived

C. can’t have arrived

D. needn’t have arrived

6. ---Didn’t you know that you went

driving at 100 kilometers an

hour, Madam?

--- _____. My old car can do no

more than 80, officer.

A. I may not have been

B. I couldn’t have been

C. I mustn’t have been

D. I shouldn’t have been

Finish the Exx. on p 58-59.

Homework

II. 情态动词

1. must be relaxing 2. might have arrived

3. can’t have failed

4. might not like

5. can’t be 6. may be living

7. might have lied

8. might not have won

《赢在课堂》随堂演练参考答案：

情态动词 ( p58)

I. 2. can’t be 3. must have

4. can’t have 5. must be

6. can’thave 7. must get up

8. can’t get up

II.

2. can’t have lived 3. can’t have given

4. must have given 5. must have sent

Weekly Lesson3 :

II. 6. must have married 7. can’t have married

8. must have been 9. can’t have been

III.2. Mary may have won…

3. He might have been …

4. He may know … 5. She could be …

6. They could be… 7. She may not be …

8. She might not have been