He can't have taken a lot of money
He can't be very old
The helicopter can't be very new
He must have climbed through the window
He must be running away.
He might have walked through the French windows.
He could be afraid
They might be married
The driver of the helicopter might be a dangerous person.
They might be brother and sister
He can't have used the main door
She might be chatting to friends.
She can't be working
She must be at home
He could have used another neighbour's window.
He must have robbed a bank
They must have a close relationship
They can't be working
She might be making a video conference with a family member.
He might be famous.
He must be hiding
He must be a chef