
Regelmäßiges Verb: snow - snowed - snowed
Einfache Form | Form mit V-ing | 
| - - it could snow - - -  | - - it could be snowing - - -  | 
Perfekt | Perfekt mit V-ing | 
| - - it could have snowed - - -  | - - it could have been snowing - - -  | 
Einfache Form | Form mit V-ing | 
| - - it could not snow - - -  | - - it could not be snowing - - -  | 
Perfekt | Perfekt mit V-ing | 
| - - it could not have snowed - - -  | - - it could not have been snowing - - -  | 
Einfache Form | Form mit V-ing | 
| - - could it snow? - - -  | - - could it be snowing? - - -  | 
Perfekt | Perfekt mit V-ing | 
| - - could it have snowed? - - -  | - - could it have been snowing? - - -  | 
Einfache Form | Form mit V-ing | 
| - - could it not snow? - - -  | - - could it not be snowing? - - -  | 
Perfekt | Perfekt mit V-ing | 
| - - could it not have snowed? - - -  | - - could it not have been snowing? - - -  |