
Regular verb: snow - snowed - snowed
Simple form | V-ing form | 
| - - it might snow - - -  | - - it might be snowing - - -  | 
Perfect | V-ing perfect | 
| - - it might have snowed - - -  | - - it might have been snowing - - -  | 
Simple form | V-ing form | 
| - - it mightn't snow - - -  | - - it mightn't be snowing - - -  | 
Perfect | V-ing perfect | 
| - - it mightn't have snowed - - -  | - - it mightn't have been snowing - - -  | 
Simple form | V-ing form | 
| - - might it snow? - - -  | - - might it be snowing? - - -  | 
Perfect | V-ing perfect | 
| - - might it have snowed? - - -  | - - might it have been snowing? - - -  | 
Simple form | V-ing form | 
| - - mightn't it snow? - - -  | - - mightn't it be snowing? - - -  | 
Perfect | V-ing perfect | 
| - - mightn't it have snowed? - - -  | - - mightn't it have been snowing? - - -  |