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 shan't happen - - - | - - it shan't be happening - - - |
Perfect | V-ing perfect |
- - it shan't have happened - - - | - - it shan't have been happening - - - |
Simple form | V-ing form |
- - shall it happen? - - - | - - shall it be happening? - - - |
Perfect | V-ing perfect |
- - shall it have happened? - - - | - - shall it have been happening? - - - |
Simple form | V-ing form |
- - shan't it happen? - - - | - - shan't it be happening? - - - |
Perfect | V-ing perfect |
- - shan't it have happened? - - - | - - shan't it have been happening? - - - |