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