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