permission

future possibility

past possibility

present possibility

complaint

future ability

present ability

past ability

Could I take 5 minutes of your time at the end?

Shiela's in the office - she could do it now.

The match could be on the other channel. Why don't you look?

If you are late back from work, I could leave it in the oven.

He could have got out through the bathroom window.

She could have told you he was her boyfriend's father!

She could speak French pretty well, I recall.

He could well be late - he usually is.