|May / might / could have: expressing past probability|
|Structure: modal + have + past participle|
may have been, could have gone, might have lost, etc.
|We use may have, could have,might have to say that it was possible that something happened in the past (but we are not 100% sure).||He may have missed the bus.|
The road might have beenblocked.
(= ‘I think the road was blocked, but I’m not 100% sure.’)
|The negatives are may not haveand might not have. We don’tuse couldn’t have in the same way.||He may not have left yet.|
I might not have given her the money; I’m not sure.