He can't move his arm. Perhaps it's broken. (might)
He can't move his arm. It might be broken.
It tastes disgusting. I'm sure it isn't fresh. (can't)
It tastes disgusting. It can`t be fresh.
He's got a cough and a sore throat. Perhaps he has a cold. (could)
He's got a cough and a sore throat.He could have a cold.
My brother often goes to that café. I'm sure he knows your sister. (must)
My brother often goes to that café. He must know your sister.
It looks bigger than a mouse. Perhaps it's a rat. (might)
It looks bigger than a mouse. It might be a rat.
This change mustn't be correct. You've given me more money than I gave you!(correct)
This change can`t be correct. You've given me more money than I gave you!
We are friends since I was six.
We have been friends since I was six.
I think you like it when you see it.
I think you`ll like it when you see it.
You have heard about the concert?
Have you heard about the concert?
