can could be able to

I _________ speak three languages fluently.

Rock climbing _____ be dangerous

I _____ eat my dinner last night. My stomach hurt.

______ you help Alice with her homework yesterday?

Megan _____ play both the piano and the guitar.

Jenny ______________ come tonight. She's ill.

Luke has ________________ swim since he was three.

You should ______________ to pass the English exam next week.

_____ he understand what you were talking about?

My sister _____ play tennis now.