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Modal Verbs for Speculation and Deduction

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

After the modal verbs of speculation and deduction in the present, we use an infinitive _______ to

a)

with

b)

without

2.

We use __________when we are 90% sure that something is not true.

a)

may not

b)

can´t

c)

couldn´t

3.

In the present, we use may (not), might (not) and could when there is a __________possibility that something is true or not ture.

a)

20%

b)

90%

c)

50%

d)

100%

4.

We use ________when we are 90% sure that something is true.

a)

may

b)

might

c)

must

5.

Choose the most appropriate answer.

The passengers .......... scared!

a)

must have been

b)

can't have been

c)

might have been

d)

couldn't have been

6.

She ...... a lot to get there! You need to work hard to be successful.

a)

couldn't have struggle

b)

must have struggled

c)

must has struggled

d)

may have struggle

7.

Of course John isn't here today. He spent the whole night dancing. He ___ be at home with a serious foot ache.

a)

can't

b)

must

c)

may

d)

should

8.

You ___ possibly be tired. You've just woken up.

a)

can't

b)

could

c)

must

d)

should

9.

Your mother ___ be a great cook. You are always so keen to get back home to eat!

a)

can't

b)

might

c)

must

d)

can

10.

I don't know why I am so tired these days. I ___ be working too hard. Or maybe I am not sleeping too well.

a)

can't

b)

might

c)

must

d)

may

11.

Do you know where Carl is? He ___ be out - his car keys are on the table.

a)

can't

b)

might

c)

must

d)

may

12.

Complete the sentence with the correct form of the verb in brackets.

Wendy's accent is a bit strange. She (a)   be Northern Irish, but I'm not sure.

13.

If he drives a jaguar, he______ be quite rich.

a)

can't

b)

must

c)

might

14.

Maria.............be at home. The lights are on.

a)

must

b)

can't

c)

might

d)

may

15.

It's quarantine. He ______________(go) to the movies yesterday.

a)

might go

b)

mustn't have gone

c)

can't have gone

d)

could have gone

16.

Complete the sentence in past.


They (a)   (understand) the topic. They didn't have any questions.

17.

What is the mistake in this sentence:


She can't to have been his girlfriend.

(a)  

18.

Complete the second sentence with 1-3 words.


Well, we will probably go to the party later today.

They family (a)   the party later

19.

Wow! Have you finished all that already? You (a)   been hungry!

20.

The exam results will be out soon. It _____ be this week or perhaps next week.

a)

must

b)

might

c)

can't