English verb conjugation
COULD BREATHE

Regular verb: breathe - breathed - breathed

Affirmation

Simple form	V-ing form
I could breathe you could breathe he could breathe we could breathe you could breathe they could breathe	I could be breathing you could be breathing he could be breathing we could be breathing you could be breathing they could be breathing
Perfect	V-ing perfect
I could have breathed you could have breathed he could have breathed we could have breathed you could have breathed they could have breathed	I could have been breathing you could have been breathing he could have been breathing we could have been breathing you could have been breathing they could have been breathing

Negation

Simple form	V-ing form
I couldn't breathe you couldn't breathe he couldn't breathe we couldn't breathe you couldn't breathe they couldn't breathe	I couldn't be breathing you couldn't be breathing he couldn't be breathing we couldn't be breathing you couldn't be breathing they couldn't be breathing
Perfect	V-ing perfect
I couldn't have breathed you couldn't have breathed he couldn't have breathed we couldn't have breathed you couldn't have breathed they couldn't have breathed	I couldn't have been breathing you couldn't have been breathing he couldn't have been breathing we couldn't have been breathing you couldn't have been breathing they couldn't have been breathing

Interrogative form

Simple form	V-ing form
could I breathe? could you breathe? could he breathe? could we breathe? could you breathe? could they breathe?	could I be breathing? could you be breathing? could he be breathing? could we be breathing? could you be breathing? could they be breathing?
Perfect	V-ing perfect
could I have breathed? could you have breathed? could he have breathed? could we have breathed? could you have breathed? could they have breathed?	could I have been breathing? could you have been breathing? could he have been breathing? could we have been breathing? could you have been breathing? could they have been breathing?

Interro-negative form

Simple form	V-ing form
couldn't I breathe? couldn't you breathe? couldn't he breathe? couldn't we breathe? couldn't you breathe? couldn't they breathe?	couldn't I be breathing? couldn't you be breathing? couldn't he be breathing? couldn't we be breathing? couldn't you be breathing? couldn't they be breathing?
Perfect	V-ing perfect
couldn't I have breathed? couldn't you have breathed? couldn't he have breathed? couldn't we have breathed? couldn't you have breathed? couldn't they have breathed?	couldn't I have been breathing? couldn't you have been breathing? couldn't he have been breathing? couldn't we have been breathing? couldn't you have been breathing? couldn't they have been breathing?