There's no juice in the fridge. Somebody ______________ it.
must have drunk
I'm not sure where John is. He _____________ still be at work.
might
I didn't hear you come in last night. I ___________ (be) asleep.
must have been
Rephrase "It's late. I'm certain that you are tired"
It's late. You MUST be tired.
It is impossible that he is Spanish.
He CAN'T BE Spanish.
Rephrase "I'm certain that Jack isn't married - he's only 17"
Jack CAN'T BE MARRIED - he's only 17.
The chair broke as soon as he sat on it. It ______________ been very well made.
can't have
I'm sure you didn't forget to do your homework.
You CAN'T HAVE FORGOTTEN to do your homework.
The burglars _____________ been looking for jewellery - nobody really knows.
might have
I can see people opening their umbrellas. It ______________ be starting to rain.
must
Perhaps he left the car unlocked.
He MIGHT/MAY/COULD HAVE LEFT the car unlocked.
Emily is crying. She ___________ be sad.
must
Rephrase "Take your umbrella. It's possible that it will rain"
Take your umbrella. It MIGHT rain
Jacqui ______________ be at the sports centre. It's closed.
can't
Rephrase "Lucy can't find her laptop. It's possible that she left it on the train"
Lucy can't find her laptop. She MIGHT HAVE LEFT it on the train
Kate is shivering. She ____________ be cold.
must
They _____________ this room yesterday - look, it's filthy!
can't have cleaned
It is possible that you forgot your wallet at home.
You MIGHT/COULD/MAY HAVE FORGOTTEN your wallet at home.
I'm sure Jane is sleeping now.
Jane MUST BE SLEEPING now.
I had an umbrella when I went out but I haven't got it now. You __________ (leave) it in the park
might / could / may have left
Rephrase "It's impossible that you've spent all your money. It's only the second day of your holiday"
You CAN'T HAVE SPENT all your money. It's only the second day of your holiday.
Rephrase "I'm certain that she cheated in the exam".
She MUST HAVE CHEATED in the exam.