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