PERFECT MODALS FOR SPECULATING ABOUT THE PAST

I left my bicycle in front of the library and it's disappeared. Someone ___________stolen it.

• must have
• can't have
• might

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

• must have
• can't have
• might have

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.

• can't have
• must have
• might have

He ___ known it was your birthday. Otherwise, I'm sure he would have wished you happy birthday.

• might have
• must have
• can't have

Our son promised to clean his room, but it is still messy.

• He can't have cleaned it.
• He couldn't clean it.
• He couldn't have clean it.

Paul class starts at 8.30. It's 8.45 and he's not here yet.

• He might have taken the bus.
• He must have missed the bus.
• He can't have missed the bus.

I don't know why he hasn't called me back.

• He must have forgotten my number.
• He might forget my number.
• He might be forgetting my number.

I'm sure you dropped you wallet at the bus stop.

• You must have dropped your wallet at the bus stop.
• You can't have dropped your wallet at the bus stop.
• You may drop your wallet at the bus stop.

Maybe Joanna missed the last bus.

• Joanna must have missed the last bus.
• Joanna might have missed the last bus.
• Joanna can't have missed the last bus.