Past Deduction

I'm sure he ate some chocolate.

• He must have eaten chocolate

• He can't have eaten chocolate

• He might have eaten chocolate

I'm sure the dog played in the mud.

• The dog must have played in the mud.

• The dog must played in the mud.

• The dog must have play in the mud.

Rihanna is rich. I'm sure she didn't steal the necklace.

• She can't have stolen the necklace.

• She must have stolen the necklace.

• She may have stolen the necklace.

I'm sure he didn't do it = ?

• He can't have done it.

• He might have done it.

• He must have done it.

She ................................studied really hard. She passed all her exams with excellent grades.

• might have

• must have

• can't have

I had to wait 45 minutes for a bus yesterday. There ................................ been an accident or maybe a strike.

• must have

• might have

• can have

Andrew did no revision for the exam but he's passed. I think he ................................ cheated.

• must have

• might have

• shouldn't have

The boss is in a terrible mood. The meeting ................................ been good.

• must have

• might have

• can't have

He ................................ arrived by now. It's only a 20 minute journey.

• might have

• must have

• can't have

He ................................ bought a new car. He doesn't have any money

• can't have

• might have

• must have