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Modals of deduction in present and past
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  • The first answer in the multiple choice question must be the correct answer.

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He ______ be from the USA. He doesn't speak English.
can't
Nobody's answering. They ______ be out.
must
She's been revising 10 hours a day for 3 weeks. She ______ be exhausted.
must
I really think Real Madrid ______ lose the final of the King's Cup. Barça are playing so well.
could/may/might
She ______ steal things from shops. She's rich and famous.
can't
This ______ be the right answer but we'll have to check with your teacher to make sure.
could/may/might
I ______ go to the party but I'm not sure yet.
may/might
Dave reckons she's from The States but I think she ______ be from Scandinavia.
could/may/might
It ______ be true about a dinosaur living in Lake Telé in the Congo. It's impossible.
can't
The exam ______ be easy. You never know.
may/might
You ______ be right but I'm going to check anyway.
may/might
If we're lucky, tomorrow ______ be a sunny day.
could/may/might
They ______ still be out! They left the house at 6am and now it's 11pm!
can't
He ______ be French, judging by his accent.
could/may/might
They ______ be away for the weekend but I'm not sure.
could/may/might
A: Who's at the door? B: I don't know; it_________ be John.
 
may
 
can't
 
must
He ________ be in class. I saw him at the library a minute ago.
 
can't
 
might not
 
must
You _________ be right, but it's better if we check.
 
might
 
can
 
can't
He ________ know the answer, he's the best in the class.
 
must
 
can
 
might
You should pick up the phone. It ________ be an important call.
 
might
 
can
 
can't
If he drives a jaguar, he _______ be quite rich.
 
must
 
might
 
can't
This is not possible. You _______ be serious!
 
can't
 
might not
 
must
He ________ be at the gym now. Sometimes he goes there at this time.
 
might
 
must
 
can't
She ________ be in love with him. She told me she hates him.
 
can't
 
might not
 
must
The phone is ringing. It _______ be Charlotte; she said she would call this morning.
 
must
 
can't
 
can
I wouldn't swim in this river if I were you. It _________ dangerous.
 
might be
 
can be
He________ be very proud of you right now. You disappointed him.
 
can't
 
must not
 
might
There's a bit of traffic, so I ________ arrive in time.
 
may not
 
must not
He ________ his son, they look completely different.
 
can't be
 
might be
 
must not be
You have walked for ten hours. You _________ exhausted.
 
must be
 
can be
 
can't be
I'm not sure I trust Peter. He ________ the person we think he is.
 
might not be
 
can't be
 
must not be
Sorry, but I'm not Connor. You _________ me for someone else.
 
must be confusing
 
must confuse
 
might be confusing
If Susan said that, it ________ true. She never lies.
 
must be
 
might be
 
can be
I think there _________ a mistake in your tax return. You should check it.
 
might be
 
can't be
 
can be
Paul is behaving in a very unusual way. I think he _________ drunk again.
 
might be
 
can't be
 
can be
Where is Dominic? - I'm not sure, he ......................... in the supermarket, he left a while ago.
might be
What happened?
The baby must have got frightened.
What happened?
She might have won the lottery.
What happened?
He must be hungry.
What happened?
She must have broken/split up with her boyfriend.
What happened?
He might be disappointed.
What happened?
She must have won the competition.
What happened?
They must have played in the mud.
What happened?
It must have rained.
What happened?
She might have been studying.
What happened?
He/She might have dropped it.
Sorry, but I'm not Connor. You ______ confusing me for someone else.
might be
I think there ______ a mistake in your tax return. You should check it.
may be or might be
He ______ be in class. I saw him at the library a minute ago.
can't
He ________ know the answer, he's the best in the class.
must
If he drives a jaguar, he ______ be quite rich.
must
She _______ be in love with him. She told me she hates him.
can't
Caroline looks very brown. The weather _______________ bad on her holiday. (be)
can't have been
Betty was very late last night. She _______________ the last bus. (miss)
must have missed
The driver didn’t stop because he _______________ the red light. (not see)
might / may not have seen
James had three sandwiches. He _______________ very hungry. (be)
must have been
Jack was in his office a minute ago. He _______________ home already. (go)
can’t have gone
I can’t find my ticket. I _______________ it. (lose)
must have lost
Tom missed his train this morning. He can’t / must have arrived on time at the office
can't
Someone’s left their mobile here. It might / can’t have been Amy or Sheila.
might
"How was your holiday?" "Great! It ___________ been better!”
couldn't have
He looks upset. He ___________ liked whatever she just said.
can't have
They __________ bought a house without borrowing money because they had no savings.
can't have
She _______________ been happy when she heard the good news.
must have
I ______________ left my phone in the car. I made a call on the drive home.
might have
The thief ___________ got in through the window. It's not broken or forced.
can't have
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