
Regular verb: frighten - frightened - frightened
Simple form | V-ing form | 
| I may frighten you may frighten she may frighten we may frighten you may frighten they may frighten  | I may be frightening you may be frightening she may be frightening we may be frightening you may be frightening they may be frightening  | 
Perfect | V-ing perfect | 
| I may have frightened you may have frightened she may have frightened we may have frightened you may have frightened they may have frightened  | I may have been frightening you may have been frightening she may have been frightening we may have been frightening you may have been frightening they may have been frightening  | 
Simple form | V-ing form | 
| I mayn't frighten you mayn't frighten she mayn't frighten we mayn't frighten you mayn't frighten they mayn't frighten  | I mayn't be frightening you mayn't be frightening she mayn't be frightening we mayn't be frightening you mayn't be frightening they mayn't be frightening  | 
Perfect | V-ing perfect | 
| I mayn't have frightened you mayn't have frightened she mayn't have frightened we mayn't have frightened you mayn't have frightened they mayn't have frightened  | I mayn't have been frightening you mayn't have been frightening she mayn't have been frightening we mayn't have been frightening you mayn't have been frightening they mayn't have been frightening  | 
Simple form | V-ing form | 
| may I frighten? may you frighten? may she frighten? may we frighten? may you frighten? may they frighten?  | may I be frightening? may you be frightening? may she be frightening? may we be frightening? may you be frightening? may they be frightening?  | 
Perfect | V-ing perfect | 
| may I have frightened? may you have frightened? may she have frightened? may we have frightened? may you have frightened? may they have frightened?  | may I have been frightening? may you have been frightening? may she have been frightening? may we have been frightening? may you have been frightening? may they have been frightening?  | 
Simple form | V-ing form | 
| mayn't I frighten? mayn't you frighten? mayn't she frighten? mayn't we frighten? mayn't you frighten? mayn't they frighten?  | mayn't I be frightening? mayn't you be frightening? mayn't she be frightening? mayn't we be frightening? mayn't you be frightening? mayn't they be frightening?  | 
Perfect | V-ing perfect | 
| mayn't I have frightened? mayn't you have frightened? mayn't she have frightened? mayn't we have frightened? mayn't you have frightened? mayn't they have frightened?  | mayn't I have been frightening? mayn't you have been frightening? mayn't she have been frightening? mayn't we have been frightening? mayn't you have been frightening? mayn't they have been frightening?  |