
Regular verb: rain - rained - rained
Simple form | V-ing form | 
| - - it might rain - - -  | - - it might be raining - - -  | 
Perfect | V-ing perfect | 
| - - it might have rained - - -  | - - it might have been raining - - -  | 
Simple form | V-ing form | 
| - - it might not rain - - -  | - - it might not be raining - - -  | 
Perfect | V-ing perfect | 
| - - it might not have rained - - -  | - - it might not have been raining - - -  | 
Simple form | V-ing form | 
| - - might it rain? - - -  | - - might it be raining? - - -  | 
Perfect | V-ing perfect | 
| - - might it have rained? - - -  | - - might it have been raining? - - -  | 
Simple form | V-ing form | 
| - - might it not rain? - - -  | - - might it not be raining? - - -  | 
Perfect | V-ing perfect | 
| - - might it not have rained? - - -  | - - might it not have been raining? - - -  |