
Verbo irregular: freeze - froze - frozen
Forma simple | Forma con V-ing | 
| - - it should freeze - - -  | - - it should be freezing - - -  | 
Perfecto | Perfecto con V-ing | 
| - - it should have frozen - - -  | - - it should have been freezing - - -  | 
Forma simple | Forma con V-ing | 
| - - it should not freeze - - -  | - - it should not be freezing - - -  | 
Perfecto | Perfecto con V-ing | 
| - - it should not have frozen - - -  | - - it should not have been freezing - - -  | 
Forma simple | Forma con V-ing | 
| - - should it freeze? - - -  | - - should it be freezing? - - -  | 
Perfecto | Perfecto con V-ing | 
| - - should it have frozen? - - -  | - - should it have been freezing? - - -  | 
Forma simple | Forma con V-ing | 
| - - should it not freeze? - - -  | - - should it not be freezing? - - -  | 
Perfecto | Perfecto con V-ing | 
| - - should it not have frozen? - - -  | - - should it not have been freezing? - - -  |