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