Verbo regular: thunder - thundered - thundered
Forma simple | Forma con V-ing |
- - it must thunder - - - | - - it must be thundering - - - |
Perfecto | Perfecto con V-ing |
- - it must have thundered - - - | - - it must have been thundering - - - |
Forma simple | Forma con V-ing |
- - it mustn't thunder - - - | - - it mustn't be thundering - - - |
Perfecto | Perfecto con V-ing |
- - it mustn't have thundered - - - | - - it mustn't have been thundering - - - |
Forma simple | Forma con V-ing |
- - must it thunder? - - - | - - must it be thundering? - - - |
Perfecto | Perfecto con V-ing |
- - must it have thundered? - - - | - - must it have been thundering? - - - |
Forma simple | Forma con V-ing |
- - mustn't it thunder? - - - | - - mustn't it be thundering? - - - |
Perfecto | Perfecto con V-ing |
- - mustn't it have thundered? - - - | - - mustn't it have been thundering? - - - |