I may breathe you may breathe he may breathe we may breathe you may breathe they may breathe
V-ing form
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
I may have breathed you may have breathed he may have breathed we may have breathed you may have breathed they may have breathed
V-ing perfect
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
Negation
Simple 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
V-ing form
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
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
V-ing perfect
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
Interrogative form
Simple form
may I breathe? may you breathe? may he breathe? may we breathe? may you breathe? may they breathe?
V-ing form
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
may I have breathed? may you have breathed? may he have breathed? may we have breathed? may you have breathed? may they have breathed?
V-ing perfect
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?
Interro-negative form
Simple 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?
V-ing form
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
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?
V-ing perfect
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?