can, could, be able to

Front

___ you hear the fireworks from your house last night?

Back

could

Front

Do you think you _______ write that report by Tuesday? I know you’re very busy.

Back

will be able to

Front

I ___ touch my toes. See!

Back

can

Front

I ___ spend another moment in that restaurant. It was too noisy.

Back

couldn't

Front

I ___ never seem to get the temperature right.

Back

can

Front

___ play professional tennis, you must be extremely fit.

Back

To be able to

Front

___ you play an instrument?

Back

Can

Front

I'm afraid I ___ attend the meeting, I’m on business in Japan.

Back

won’t be able to

Front

___ you have brought it to me at work?

Back

Couldn't

Front

They ___ save the men from the sinking ship.

Back

were able to