Regular verb: rain - rained - rained
Simple form | V-ing form |
- - it must rain - - - | - - it must be raining - - - |
Perfect | V-ing perfect |
- - it must have rained - - - | - - it must have been raining - - - |
Simple form | V-ing form |
- - it mustn't rain - - - | - - it mustn't be raining - - - |
Perfect | V-ing perfect |
- - it mustn't have rained - - - | - - it mustn't have been raining - - - |
Simple form | V-ing form |
- - must it rain? - - - | - - must it be raining? - - - |
Perfect | V-ing perfect |
- - must it have rained? - - - | - - must it have been raining? - - - |
Simple form | V-ing form |
- - mustn't it rain? - - - | - - mustn't it be raining? - - - |
Perfect | V-ing perfect |
- - mustn't it have rained? - - - | - - mustn't it have been raining? - - - |