could gulf
Regular verb: gulf - gulfed- gulfed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could gulf
you could gulf
she could gulf
we could gulf
you could gulf
they could gulf 	I could be gulfing
you could be gulfing
she could be gulfing
we could be gulfing
you could be gulfing
they could be gulfing	I could have gulfed
you could have gulfed
she could have gulfed
we could have gulfed
you could have gulfed
they could have gulfed	I could have been gulfing
you could have been gulfing
she could have been gulfing
we could have been gulfing
you could have been gulfing
they could have been gulfing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't gulf
you couldn't gulf
she couldn't gulf
we couldn't gulf
you couldn't gulf
they couldn't gulf 	I couldn't be gulfing
you couldn't be gulfing
she couldn't be gulfing
we couldn't be gulfing
you couldn't be gulfing
they couldn't be gulfing	I couldn't have gulfed
you couldn't have gulfed
she couldn't have gulfed
we couldn't have gulfed
you couldn't have gulfed
they couldn't have gulfed	I couldn't have been gulfing
you couldn't have been gulfing
she couldn't have been gulfing
we couldn't have been gulfing
you couldn't have been gulfing
they couldn't have been gulfing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I gulf?
could you gulf?
could she gulf?
could we gulf?
could you gulf?
could they gulf? 	could I be gulfing?
could you be gulfing?
could she be gulfing?
could we be gulfing?
could you be gulfing?
could they be gulfing? 	could I have gulfed?
could you have gulfed?
could she have gulfed?
could we have gulfed?
could you have gulfed?
could they have gulfed? 	could I have been gulfing?
could you have been gulfing?
could she have been gulfing?
could we have been gulfing?
could you have been gulfing?
could they have been gulfing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I gulf?
couldn't you gulf?
couldn't she gulf?
couldn't we gulf?
couldn't you gulf?
couldn't they gulf? 	couldn't I be gulfing?
couldn't you be gulfing?
couldn't she be gulfing?
couldn't we be gulfing?
couldn't you be gulfing?
couldn't they be gulfing? 	couldn't I have gulfed?
couldn't you have gulfed?
couldn't she have gulfed?
couldn't we have gulfed?
couldn't you have gulfed?
couldn't they have gulfed? 	couldn't I have been gulfing?
couldn't you have been gulfing?
couldn't she have been gulfing?
couldn't we have been gulfing?
couldn't you have been gulfing?
couldn't they have been gulfing?