Modals of speculation

It _____ be a ghost! They don't exist

• must

• can't

• may

• could

You _____ have thirty pairs of shoes! They don't fit in the cupboard!

• must

• might

• can't

Mum ____ know Timothy. We should aks if she works with him.

• can't

• must

• might

• may

Max____ come with me because he had to revise.

• couldn't

• might not

• may

• must

It ____ be tru because it's in all the newspapers.

• couldn't

• can't

• could

• must

Sophie____ learn to drive yet. She's only 15

• must

• might

• can't

• might not

I _______ to study medicine but, in the end, I wanted to study languages.

• could have decided

• can't have decided

• must have decided

Mrs Martin __________ the bicylcle, or she wouldn't have had the accident.

• must have seen

• might have seen

• couldn't have seen

Frank ______ busy or he would have answered the phone.

• might have been

• must have been

• may have been

You ______ of him, but he's a really famous actor.

• might not have heard

• must have heard

• cannot have heard