
Verbe régulier : sum -  summed - summed
Traduction française : additionner - calculer 
Forme simple | Forme en V-ing | 
| I may sum you may sum she may sum we may sum you may sum they may sum  | I may be summing you may be summing she may be summing we may be summing you may be summing they may be summing  | 
Perfect | Perfect en V-ing | 
| I may have summed you may have summed she may have summed we may have summed you may have summed they may have summed  | I may have been summing you may have been summing she may have been summing we may have been summing you may have been summing they may have been summing  | 
Forme simple | Forme en V-ing | 
| I mayn't sum you mayn't sum she mayn't sum we mayn't sum you mayn't sum they mayn't sum  | I mayn't be summing you mayn't be summing she mayn't be summing we mayn't be summing you mayn't be summing they mayn't be summing  | 
Perfect | Perfect en V-ing | 
| I mayn't have summed you mayn't have summed she mayn't have summed we mayn't have summed you mayn't have summed they mayn't have summed  | I mayn't have been summing you mayn't have been summing she mayn't have been summing we mayn't have been summing you mayn't have been summing they mayn't have been summing  | 
Forme simple | Forme en V-ing | 
| may I sum? may you sum? may she sum? may we sum? may you sum? may they sum?  | may I be summing? may you be summing? may she be summing? may we be summing? may you be summing? may they be summing?  | 
Perfect | Perfect en V-ing | 
| may I have summed? may you have summed? may she have summed? may we have summed? may you have summed? may they have summed?  | may I have been summing? may you have been summing? may she have been summing? may we have been summing? may you have been summing? may they have been summing?  | 
Forme simple | Forme en V-ing | 
| mayn't I sum? mayn't you sum? mayn't she sum? mayn't we sum? mayn't you sum? mayn't they sum?  | mayn't I be summing? mayn't you be summing? mayn't she be summing? mayn't we be summing? mayn't you be summing? mayn't they be summing?  | 
Perfect | Perfect en V-ing | 
| mayn't I have summed? mayn't you have summed? mayn't she have summed? mayn't we have summed? mayn't you have summed? mayn't they have summed?  | mayn't I have been summing? mayn't you have been summing? mayn't she have been summing? mayn't we have been summing? mayn't you have been summing? mayn't they have been summing?  |