Modals of probability

My classmate can play basketball very well.

• he must practice every day

• he must be practice every day.

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

• He must be exercise a lot.

• He must exercise a lot.

John and Steve are running to their next class.

• they might be late.

• they might late.

There's someone studying at the library.

• it can't David. I think he is at home.

• it can't be David. I think he is at home.

Can you see that bright light in the sky?

• it could a spaceship.

• it could be a spacechip.

My cousin just went shopping and bought lots of clothes.

• She must have lots of money.

• she must be have lots of money.

Susan is telling everyone the password.

• it may not be a secret.

• it may not a secret.

What is the capital city of the United states?

• I don't know, it must be new york.

• I don't know, it might be new york.

My classmate just raised her hand.

• She must know the answer.

• She can't know the answer.

I just saw Mathew and he looks nervous.

• He might be going to his driving test.

• He might going to his driving test.