could engulf
Regular verb: engulf - engulfed- engulfed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could engulf
you could engulf
he could engulf
we could engulf
you could engulf
they could engulf 	I could be engulfing
you could be engulfing
he could be engulfing
we could be engulfing
you could be engulfing
they could be engulfing	I could have engulfed
you could have engulfed
he could have engulfed
we could have engulfed
you could have engulfed
they could have engulfed	I could have been engulfing
you could have been engulfing
he could have been engulfing
we could have been engulfing
you could have been engulfing
they could have been engulfing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't engulf
you couldn't engulf
he couldn't engulf
we couldn't engulf
you couldn't engulf
they couldn't engulf 	I couldn't be engulfing
you couldn't be engulfing
he couldn't be engulfing
we couldn't be engulfing
you couldn't be engulfing
they couldn't be engulfing	I couldn't have engulfed
you couldn't have engulfed
he couldn't have engulfed
we couldn't have engulfed
you couldn't have engulfed
they couldn't have engulfed	I couldn't have been engulfing
you couldn't have been engulfing
he couldn't have been engulfing
we couldn't have been engulfing
you couldn't have been engulfing
they couldn't have been engulfing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I engulf?
could you engulf?
could he engulf?
could we engulf?
could you engulf?
could they engulf? 	could I be engulfing?
could you be engulfing?
could he be engulfing?
could we be engulfing?
could you be engulfing?
could they be engulfing? 	could I have engulfed?
could you have engulfed?
could he have engulfed?
could we have engulfed?
could you have engulfed?
could they have engulfed? 	could I have been engulfing?
could you have been engulfing?
could he have been engulfing?
could we have been engulfing?
could you have been engulfing?
could they have been engulfing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I engulf?
couldn't you engulf?
couldn't he engulf?
couldn't we engulf?
couldn't you engulf?
couldn't they engulf? 	couldn't I be engulfing?
couldn't you be engulfing?
couldn't he be engulfing?
couldn't we be engulfing?
couldn't you be engulfing?
couldn't they be engulfing? 	couldn't I have engulfed?
couldn't you have engulfed?
couldn't he have engulfed?
couldn't we have engulfed?
couldn't you have engulfed?
couldn't they have engulfed? 	couldn't I have been engulfing?
couldn't you have been engulfing?
couldn't he have been engulfing?
couldn't we have been engulfing?
couldn't you have been engulfing?
couldn't they have been engulfing?