Modal Verbs of Deduction

We use _____ to say that we think something is possible but we’re not totally sure.

• could, can

• may, might, could

• may, might, must

• may, might, can

We use _______ when we feel sure something is not true.

• couldn't

• mustn't

• might / may not

• can't

We use ______ when we feel sure or certain that something is true.

• must

• might, may

• can

• could

After these modal verbs we use ______.

• to + infinitive

• infinitive without to

• verbs in present form

That ___ be Danny outside. He said he was going abroad this week.

• must

• can't

• might

I'm leaving work now but I ___ be a little late if there's traffic on the road.

• must

• can't

• could

Of course John isn't here today. He spent the whole night drinking. He ___ be at home with a serious hangover.

• must

• can't

• may

You ___ possibly be tired. You've just woken up

• must

• could

• can't

You ___ know Peter because he went to the same school that we went to but he is a few years younger than we are.

• must

• might

• can't

I'm sorry, you ___ be confusing me with someone else, that's not my name.

• may

• must

• can't