could breathe
Regular verb: breathe - breathed- breathed

Affirmation 	
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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	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 	
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I could not breathe
you could not breathe
he could not breathe
we could not breathe
you could not breathe
they could not breathe 	I could not be breathing
you could not be breathing
he could not be breathing
we could not be breathing
you could not be breathing
they could not be breathing	I could not have breathed
you could not have breathed
he could not have breathed
we could not have breathed
you could not have breathed
they could not have breathed	I could not have been breathing
you could not have been breathing
he could not have been breathing
we could not have been breathing
you could not have been breathing
they could not have been breathing	

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