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 could not gulf
you could not gulf
she could not gulf
we could not gulf
you could not gulf
they could not gulf 	I could not be gulfing
you could not be gulfing
she could not be gulfing
we could not be gulfing
you could not be gulfing
they could not be gulfing	I could not have gulfed
you could not have gulfed
she could not have gulfed
we could not have gulfed
you could not have gulfed
they could not have gulfed	I could not have been gulfing
you could not have been gulfing
she could not have been gulfing
we could not have been gulfing
you could not have been gulfing
they could not 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 	
could I not gulf?
could you not gulf?
could she not gulf?
could we not gulf?
could you not gulf?
could they not gulf? 	could I not be gulfing?
could you not be gulfing?
could she not be gulfing?
could we not be gulfing?
could you not be gulfing?
could they not be gulfing? 	could I not have gulfed?
could you not have gulfed?
could she not have gulfed?
could we not have gulfed?
could you not have gulfed?
could they not have gulfed? 	could I not have been gulfing?
could you not have been gulfing?
could she not have been gulfing?
could we not have been gulfing?
could you not have been gulfing?
could they not have been gulfing?