Grammar Quiz

Modal Verbs of Deduction and Speculation Quiz


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Clara looks happy!

A. She must have passed her exams.

B. She must pass her exams.


My classmate can play basketball.

A. He must practice every day.

B. He must be practice every day.


What’s the capital city of the United States?

A. I don’t know but it mustn’t be New York

B. I don’t know but it can’t be New York.


Hey! Look out the window, everyone. It’s snowing!

A. It can’t be snowing! It’s August!

B. It mustn’t be snowing! It’s August!


My cousin just went shopping and bought lots of clothes.

A. She must have lots of money.

B. She might have lots of money.


My uncle is very strong. He can lift 300 kilograms!

A. He could exercise a lot.

B. He must exercise a lot.


My friend always passes his exams at school.

A. He may study very hard.

B. He must study very hard.


John and Steven are running to their next class.

A. They might be late.

B. They might late.


Susan is telling everyone the password.

A. It mustn’t be a secret.

B. It mustn’t a secret.


Sandra isn’t at drama club today.

A. She might be ill.

B. She can’t be ill.


Dima isn’t at home, he always plays tennis on Friday.

A. He can’t be at the sports centre now.

B. He must be at the sports centre now.


There’s someone studying at the library.

A. It can be David. I think he’s at home.

B. It can’t be David. I think he’s at home.


Can you see that bright light in the sky?

A. It could a spaceship.

B. It could be a spaceship.


I can’t find my glasses. I definitely had them on the bus.

A. I can’t have left them at home.

B. I can’t leave them at home.


My classmate is raising her hand.

A. She must know the answer.

B. She must have known the answer.




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