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