English verb conjugation
SHOULD BREATHE

Regular verb: breathe - breathed - breathed

Affirmation

Simple form	V-ing form
I'd breathe you'd breathe he'd breathe we'd breathe you'd breathe they'd breathe	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	V-ing perfect
I should've breathed you should've breathed he should've breathed we should've breathed you should've breathed they should've breathed	I should've been breathing you should've been breathing he should've been breathing we should've been breathing you should've been breathing they should've been breathing

Negation

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

Interrogative form

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

Interro-negative form

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