Which sentence most accurately describes the difference between "could have done" and "should have done"?

Question

Accepted Answer

"Could have done" expresses a missed opportunity; "should have done" expresses regret or criticism that something was not done.

Answer

"Could have done" and "should have done" are interchangeable in all contexts.

Answer

"Could have done" expresses regret; "should have done" expresses a past possibility that was not taken.

Answer

"Could have done" expresses certainty; "should have done" expresses uncertainty about the past.

Crowdly