
Verbo regular: serve - served - served
Forma simple | Forma con V-ing | 
| I may serve you may serve she may serve we may serve you may serve they may serve  | I may be serving you may be serving she may be serving we may be serving you may be serving they may be serving  | 
Perfecto | Perfecto con V-ing | 
| I may have served you may have served she may have served we may have served you may have served they may have served  | I may have been serving you may have been serving she may have been serving we may have been serving you may have been serving they may have been serving  | 
Forma simple | Forma con V-ing | 
| I mayn't serve you mayn't serve she mayn't serve we mayn't serve you mayn't serve they mayn't serve  | I mayn't be serving you mayn't be serving she mayn't be serving we mayn't be serving you mayn't be serving they mayn't be serving  | 
Perfecto | Perfecto con V-ing | 
| I mayn't have served you mayn't have served she mayn't have served we mayn't have served you mayn't have served they mayn't have served  | I mayn't have been serving you mayn't have been serving she mayn't have been serving we mayn't have been serving you mayn't have been serving they mayn't have been serving  | 
Forma simple | Forma con V-ing | 
| may I serve? may you serve? may she serve? may we serve? may you serve? may they serve?  | may I be serving? may you be serving? may she be serving? may we be serving? may you be serving? may they be serving?  | 
Perfecto | Perfecto con V-ing | 
| may I have served? may you have served? may she have served? may we have served? may you have served? may they have served?  | may I have been serving? may you have been serving? may she have been serving? may we have been serving? may you have been serving? may they have been serving?  | 
Forma simple | Forma con V-ing | 
| mayn't I serve? mayn't you serve? mayn't she serve? mayn't we serve? mayn't you serve? mayn't they serve?  | mayn't I be serving? mayn't you be serving? mayn't she be serving? mayn't we be serving? mayn't you be serving? mayn't they be serving?  | 
Perfecto | Perfecto con V-ing | 
| mayn't I have served? mayn't you have served? mayn't she have served? mayn't we have served? mayn't you have served? mayn't they have served?  | mayn't I have been serving? mayn't you have been serving? mayn't she have been serving? mayn't we have been serving? mayn't you have been serving? mayn't they have been serving?  |