Must
Mike is sad. I’m sure he has a problem.
Mike must have a problem.
They had lunch half an hour ago. They are not hungry, it’s impossible.
They can't be hungry.
Perhaps she is right.
She may/might be right.
Perhaps he doesn’t like coffee.
He may not/might not like coffee.
I always buy a lottery ticket. I _______ win one day.
I may/might win one day.
Listen to her accent. I feel sure she is from Scotland.
She must be from Scotland.
Listen to her accent. I’m sure she isn’t American.
She can't be American.
Perhaps they are at home.
They may/might be home.
Perhaps he doesn’t speak Spanish.
He may not/ might not speak Spanish.
What I heard on TV _________ be true. It is fake news.
What I heard on TV can't be true.
Ana wanted to get a promotion, but she didn’t. I’m sure she is disappointed.
Ana must be disappointed.
They haven’t lived here for very long. I’m sure they don’t know many people.
They can't know many people.
Perhaps they are wrong.
They may/might be wrong.
Perhaps she doesn’t like cooking.
She may not/ might not like cooking.
The weather forecast says that it _______ rain today.
The weather forecast says that it may/might rain today.
You went to bed at 3 a.m. and woke up at 6 a.m. I’m sure you are still tired.
The light in his window is out. I’m sure he isn’t at home.
She can't be at home.
Perhaps they are late.
They may/might be late.
Perhaps she isn’t coming.
She may not/ might not come.
He always does well on exams. He ______ study hard.
He always does well on exams. He must study hard.
Bob usually drives his car to work, but today he took the bus. I am sure there is something wrong with his car.
His car must be broken.
I filled up the tank yesterday. I’m sure we don’t need petrol.
We can't need petrol.
Perhaps she likes painting.
She may/might like painting.
Perhaps he isn't angry with her.
He may not/ might not be angry with her.
Paul hasn’t come to classes today. His friend told me he wasn’t feeling well. He _______ be sick.
Paul hasn’t come to classes today. His friend told me he wasn’t feeling well. He must be sick.