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

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

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

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

You ___ know Peter because he was in our school but he was in a different course. 

I don't like the sound of the engine.  I don't know what it really is. It _____ be a mechanical problem.

 It _______ be a mechanical problem. I've just taken the car to a mechanic. He fixed it. 

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

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

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

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

After these modal verbs we use ______.