Irregular verb: freeze - froze - frozen
Simple form | V-ing form |
- - it could freeze - - - | - - it could be freezing - - - |
Perfect | V-ing perfect |
- - it could have frozen - - - | - - it could have been freezing - - - |
Simple form | V-ing form |
- - it couldn't freeze - - - | - - it couldn't be freezing - - - |
Perfect | V-ing perfect |
- - it couldn't have frozen - - - | - - it couldn't have been freezing - - - |
Simple form | V-ing form |
- - could it freeze? - - - | - - could it be freezing? - - - |
Perfect | V-ing perfect |
- - could it have frozen? - - - | - - could it have been freezing? - - - |
Simple form | V-ing form |
- - couldn't it freeze? - - - | - - couldn't it be freezing? - - - |
Perfect | V-ing perfect |
- - couldn't it have frozen? - - - | - - couldn't it have been freezing? - - - |