Modals for Certainty May Might Can't Must

Is Jeff a good student?

He ____. I don't know him well, but I heard he was offered a scholarship for next year.

• must be

• could be

• is

Do you know where Eva is?

She _____ at Barbara's house. She said something about wanting to visit after work today, but I'm really not sure.

• must be

• could be

• is

I stayed up all night finishing this report for the boss.

You _____ really tired.

• must feel

• might feel

• feel

Do you think the grocery store is still open?

It ______. I can't ever remember what their hours are.

• must be

• could be

• is

It's supposed to rain tomorrow.

I know, but the forecast _____ wrong. Weather forecasts are far from 100 percent accurate.

• must be

• could be

• is

I heard that Jane has received a scholarship and will be able to attend university in the fall.

Wonderful! That's good news. She _____ very happy to have the matter finally settled.

• must be

• may be

• is

Excuse me. Could you tell me which bus I should take to get to City Hall?

Hmmm. Bus number 63 ______ there. But you'd better ask the driver.

• must go

• might go

• goes

Do you think Mrs. Chu is sick?

She ______. I can't think of anything else that would have kept her from coming.

• must be

• may be

• is

Is that Adam's brother standing with him in the cafeteria line?

It _____, I guess. He does look a little like Adam.

• must be

• could be

• is

Let's be really quiet when we go into the baby's room. The baby _______, and we don't want to wake him up.

Okay.

• might sleep

• might be sleeping

• might have been sleeping