I'd be breathing you'd be breathing he'd be breathing we'd be breathing you'd be breathing they'd be breathing
Perfect
I would've breathed you would've breathed he would've breathed we would've breathed you would've breathed they would've breathed
V-ing perfect
I would've been breathing you would've been breathing he would've been breathing we would've been breathing you would've been breathing they would've been breathing
Negation
Simple form
I wouldn't breathe you wouldn't breathe he wouldn't breathe we wouldn't breathe you wouldn't breathe they wouldn't breathe
V-ing form
I wouldn't be breathing you wouldn't be breathing he wouldn't be breathing we wouldn't be breathing you wouldn't be breathing they wouldn't be breathing
Perfect
I wouldn't have breathed you wouldn't have breathed he wouldn't have breathed we wouldn't have breathed you wouldn't have breathed they wouldn't have breathed
V-ing perfect
I wouldn't have been breathing you wouldn't have been breathing he wouldn't have been breathing we wouldn't have been breathing you wouldn't have been breathing they wouldn't have been breathing
Interrogative form
Simple form
would I breathe? would you breathe? would he breathe? would we breathe? would you breathe? would they breathe?
V-ing form
would I be breathing? would you be breathing? would he be breathing? would we be breathing? would you be breathing? would they be breathing?
Perfect
would I have breathed? would you have breathed? would he have breathed? would we have breathed? would you have breathed? would they have breathed?
V-ing perfect
would I have been breathing? would you have been breathing? would he have been breathing? would we have been breathing? would you have been breathing? would they have been breathing?
Interro-negative form
Simple form
wouldn't I breathe? wouldn't you breathe? wouldn't he breathe? wouldn't we breathe? wouldn't you breathe? wouldn't they breathe?
V-ing form
wouldn't I be breathing? wouldn't you be breathing? wouldn't he be breathing? wouldn't we be breathing? wouldn't you be breathing? wouldn't they be breathing?
Perfect
wouldn't I have breathed? wouldn't you have breathed? wouldn't he have breathed? wouldn't we have breathed? wouldn't you have breathed? wouldn't they have breathed?
V-ing perfect
wouldn't I have been breathing? wouldn't you have been breathing? wouldn't he have been breathing? wouldn't we have been breathing? wouldn't you have been breathing? wouldn't they have been breathing?