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