
Regular verb: frock - frocked - frocked
Simple form | V-ing form | 
| I may frock you may frock he may frock we may frock you may frock they may frock  | I may be frocking you may be frocking he may be frocking we may be frocking you may be frocking they may be frocking  | 
Perfect | V-ing perfect | 
| I may have frocked you may have frocked he may have frocked we may have frocked you may have frocked they may have frocked  | I may have been frocking you may have been frocking he may have been frocking we may have been frocking you may have been frocking they may have been frocking  | 
Simple form | V-ing form | 
| I mayn't frock you mayn't frock he mayn't frock we mayn't frock you mayn't frock they mayn't frock  | I mayn't be frocking you mayn't be frocking he mayn't be frocking we mayn't be frocking you mayn't be frocking they mayn't be frocking  | 
Perfect | V-ing perfect | 
| I mayn't have frocked you mayn't have frocked he mayn't have frocked we mayn't have frocked you mayn't have frocked they mayn't have frocked  | I mayn't have been frocking you mayn't have been frocking he mayn't have been frocking we mayn't have been frocking you mayn't have been frocking they mayn't have been frocking  | 
Simple form | V-ing form | 
| may I frock? may you frock? may he frock? may we frock? may you frock? may they frock?  | may I be frocking? may you be frocking? may he be frocking? may we be frocking? may you be frocking? may they be frocking?  | 
Perfect | V-ing perfect | 
| may I have frocked? may you have frocked? may he have frocked? may we have frocked? may you have frocked? may they have frocked?  | may I have been frocking? may you have been frocking? may he have been frocking? may we have been frocking? may you have been frocking? may they have been frocking?  | 
Simple form | V-ing form | 
| mayn't I frock? mayn't you frock? mayn't he frock? mayn't we frock? mayn't you frock? mayn't they frock?  | mayn't I be frocking? mayn't you be frocking? mayn't he be frocking? mayn't we be frocking? mayn't you be frocking? mayn't they be frocking?  | 
Perfect | V-ing perfect | 
| mayn't I have frocked? mayn't you have frocked? mayn't he have frocked? mayn't we have frocked? mayn't you have frocked? mayn't they have frocked?  | mayn't I have been frocking? mayn't you have been frocking? mayn't he have been frocking? mayn't we have been frocking? mayn't you have been frocking? mayn't they have been frocking?  |