ST: Modal Verbs

They’ve got lots of shopping bags. I think they’ve been shopping. (MUST)

They ______________________________________________ shopping.

I don’t know if they are friends. (COULD)

They ______________________________________________ friends.

I’m sure she is waiting at the bus stop. (MUST)

She______________________________________________ at the bus stop.

That’s not Simon. He’s out of the country at the moment. (CAN’T)

That ______________________________________________. He’s out of the country at the moment.

It’s possible they will deliver the books this afternoon. (MIGHT)

The books ______________________________________________ this afternoon.

I don’t believe they saw a ghost. (SEEN)

They ______________________________________________ a ghost.