could hull
Regular verb: hull - hulled- hulled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could hull
you could hull
he could hull
we could hull
you could hull
they could hull 	I could be hulling
you could be hulling
he could be hulling
we could be hulling
you could be hulling
they could be hulling	I could have hulled
you could have hulled
he could have hulled
we could have hulled
you could have hulled
they could have hulled	I could have been hulling
you could have been hulling
he could have been hulling
we could have been hulling
you could have been hulling
they could have been hulling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't hull
you couldn't hull
he couldn't hull
we couldn't hull
you couldn't hull
they couldn't hull 	I couldn't be hulling
you couldn't be hulling
he couldn't be hulling
we couldn't be hulling
you couldn't be hulling
they couldn't be hulling	I couldn't have hulled
you couldn't have hulled
he couldn't have hulled
we couldn't have hulled
you couldn't have hulled
they couldn't have hulled	I couldn't have been hulling
you couldn't have been hulling
he couldn't have been hulling
we couldn't have been hulling
you couldn't have been hulling
they couldn't have been hulling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I hull?
could you hull?
could he hull?
could we hull?
could you hull?
could they hull? 	could I be hulling?
could you be hulling?
could he be hulling?
could we be hulling?
could you be hulling?
could they be hulling? 	could I have hulled?
could you have hulled?
could he have hulled?
could we have hulled?
could you have hulled?
could they have hulled? 	could I have been hulling?
could you have been hulling?
could he have been hulling?
could we have been hulling?
could you have been hulling?
could they have been hulling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I hull?
couldn't you hull?
couldn't he hull?
couldn't we hull?
couldn't you hull?
couldn't they hull? 	couldn't I be hulling?
couldn't you be hulling?
couldn't he be hulling?
couldn't we be hulling?
couldn't you be hulling?
couldn't they be hulling? 	couldn't I have hulled?
couldn't you have hulled?
couldn't he have hulled?
couldn't we have hulled?
couldn't you have hulled?
couldn't they have hulled? 	couldn't I have been hulling?
couldn't you have been hulling?
couldn't he have been hulling?
couldn't we have been hulling?
couldn't you have been hulling?
couldn't they have been hulling?