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