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 may not breathe you may not breathe he may not breathe we may not breathe you may not breathe they may not breathe
V-ing form
I may not be breathing you may not be breathing he may not be breathing we may not be breathing you may not be breathing they may not be breathing
Perfect
I may not have breathed you may not have breathed he may not have breathed we may not have breathed you may not have breathed they may not have breathed
V-ing perfect
I may not have been breathing you may not have been breathing he may not have been breathing we may not have been breathing you may not have been breathing they may not 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
may I not breathe? may you not breathe? may he not breathe? may we not breathe? may you not breathe? may they not breathe?
V-ing form
may I not be breathing? may you not be breathing? may he not be breathing? may we not be breathing? may you not be breathing? may they not be breathing?
Perfect
may I not have breathed? may you not have breathed? may he not have breathed? may we not have breathed? may you not have breathed? may they not have breathed?
V-ing perfect
may I not have been breathing? may you not have been breathing? may he not have been breathing? may we not have been breathing? may you not have been breathing? may they not have been breathing?