can gull
Regular verb: gull - gulled- gulled

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

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

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

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