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