Modals of Possibility

He's got an unusual accent. He ______ foreign.

• must be

• can't be

He's had three car accidents this year, so he _______ a good driver.

• must be

• can't be

He's just broken that car window. He ________ a thief.

• can't be

• must be

She always says horrible things about her friends so she _______ a nice person.

• can't be

• must

Somebody has just stolen his passport so he ________ at the police station now.

• must be

• can't be

They started playing tennis in the hot sun two hours ago. They _______ thirsty.

• can't be

• must be

This dictionary has my name in it, so it _________ yours.

• must be

• can't be

We've only walked 200 metres. You _______ tired already.

• can't be

• must be

They found the money and jewellery in his pockets. He ______ be the thief.

• Can't

• Must

The sitting room window is broken. There _________ be a thief there.

• Might

• Can't