Regular verb: happen - happened - happened
Simple form | V-ing form |
- - it might happen - - - | - - it might be happening - - - |
Perfect | V-ing perfect |
- - it might have happened - - - | - - it might have been happening - - - |
Simple form | V-ing form |
- - it mightn't happen - - - | - - it mightn't be happening - - - |
Perfect | V-ing perfect |
- - it mightn't have happened - - - | - - it mightn't have been happening - - - |
Simple form | V-ing form |
- - might it happen? - - - | - - might it be happening? - - - |
Perfect | V-ing perfect |
- - might it have happened? - - - | - - might it have been happening? - - - |
Simple form | V-ing form |
- - mightn't it happen? - - - | - - mightn't it be happening? - - - |
Perfect | V-ing perfect |
- - mightn't it have happened? - - - | - - mightn't it have been happening? - - - |