could gull
Regular verb: gull - gulled- gulled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could gull
you could gull
she could gull
we could gull
you could gull
they could gull 	I could be gulling
you could be gulling
she could be gulling
we could be gulling
you could be gulling
they could be gulling	I could have gulled
you could have gulled
she could have gulled
we could have gulled
you could have gulled
they could have gulled	I could have been gulling
you could have been gulling
she could have been gulling
we could have been gulling
you could have been gulling
they could have been gulling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't gull
you couldn't gull
she couldn't gull
we couldn't gull
you couldn't gull
they couldn't gull 	I couldn't be gulling
you couldn't be gulling
she couldn't be gulling
we couldn't be gulling
you couldn't be gulling
they couldn't be gulling	I couldn't have gulled
you couldn't have gulled
she couldn't have gulled
we couldn't have gulled
you couldn't have gulled
they couldn't have gulled	I couldn't have been gulling
you couldn't have been gulling
she couldn't have been gulling
we couldn't have been gulling
you couldn't have been gulling
they couldn't have been gulling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I gull?
could you gull?
could she gull?
could we gull?
could you gull?
could they gull? 	could I be gulling?
could you be gulling?
could she be gulling?
could we be gulling?
could you be gulling?
could they be gulling? 	could I have gulled?
could you have gulled?
could she have gulled?
could we have gulled?
could you have gulled?
could they have gulled? 	could I have been gulling?
could you have been gulling?
could she have been gulling?
could we have been gulling?
could you have been gulling?
could they have been gulling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I gull?
couldn't you gull?
couldn't she gull?
couldn't we gull?
couldn't you gull?
couldn't they gull? 	couldn't I be gulling?
couldn't you be gulling?
couldn't she be gulling?
couldn't we be gulling?
couldn't you be gulling?
couldn't they be gulling? 	couldn't I have gulled?
couldn't you have gulled?
couldn't she have gulled?
couldn't we have gulled?
couldn't you have gulled?
couldn't they have gulled? 	couldn't I have been gulling?
couldn't you have been gulling?
couldn't she have been gulling?
couldn't we have been gulling?
couldn't you have been gulling?
couldn't they have been gulling?