1. Did you hear a noise?
THAT MUST probably be the cat.
2. I had to walk all the way here.
You must HAVE BEEN exhausted. Put your feet up. I'll make us a nice cup of tea.
3. Your favorite program's on.
It MUSTN'T be. It's only half past five.
4. Andy made me redo every single one of the reports.
You MUST have been furious.
5. Laura walked right past me in the street without saying a word.
She CAN'T have seen you.
6. I can't believe I got the final question in the pop quiz wrong.
Don't worry. I WOULDN'T have known the answer either.
7. I can't wait to get that blue top tomorrow.
I wouldn't get too excited. They only had one left, so they MAY well have sold out.
8. It's very cold.
Yes, I think it MIGHT easily snow tonight.
9. I can't wait till Roger gets here!
He should HAVE LANDED by now, so he'll be here in about an hour.
10. I hope they've got some tickets left.
We MIGHT just be lucky and get the last two.