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