could mullion
Regular verb: mullion - mullioned- mullioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mullion
you could mullion
he could mullion
we could mullion
you could mullion
they could mullion 	I could be mullioning
you could be mullioning
he could be mullioning
we could be mullioning
you could be mullioning
they could be mullioning	I could have mullioned
you could have mullioned
he could have mullioned
we could have mullioned
you could have mullioned
they could have mullioned	I could have been mullioning
you could have been mullioning
he could have been mullioning
we could have been mullioning
you could have been mullioning
they could have been mullioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't mullion
you couldn't mullion
he couldn't mullion
we couldn't mullion
you couldn't mullion
they couldn't mullion 	I couldn't be mullioning
you couldn't be mullioning
he couldn't be mullioning
we couldn't be mullioning
you couldn't be mullioning
they couldn't be mullioning	I couldn't have mullioned
you couldn't have mullioned
he couldn't have mullioned
we couldn't have mullioned
you couldn't have mullioned
they couldn't have mullioned	I couldn't have been mullioning
you couldn't have been mullioning
he couldn't have been mullioning
we couldn't have been mullioning
you couldn't have been mullioning
they couldn't have been mullioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I mullion?
could you mullion?
could he mullion?
could we mullion?
could you mullion?
could they mullion? 	could I be mullioning?
could you be mullioning?
could he be mullioning?
could we be mullioning?
could you be mullioning?
could they be mullioning? 	could I have mullioned?
could you have mullioned?
could he have mullioned?
could we have mullioned?
could you have mullioned?
could they have mullioned? 	could I have been mullioning?
could you have been mullioning?
could he have been mullioning?
could we have been mullioning?
could you have been mullioning?
could they have been mullioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I mullion?
couldn't you mullion?
couldn't he mullion?
couldn't we mullion?
couldn't you mullion?
couldn't they mullion? 	couldn't I be mullioning?
couldn't you be mullioning?
couldn't he be mullioning?
couldn't we be mullioning?
couldn't you be mullioning?
couldn't they be mullioning? 	couldn't I have mullioned?
couldn't you have mullioned?
couldn't he have mullioned?
couldn't we have mullioned?
couldn't you have mullioned?
couldn't they have mullioned? 	couldn't I have been mullioning?
couldn't you have been mullioning?
couldn't he have been mullioning?
couldn't we have been mullioning?
couldn't you have been mullioning?
couldn't they have been mullioning?