could pencil
Regular verb: pencil - pencilled- pencilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pencil
you could pencil
he could pencil
we could pencil
you could pencil
they could pencil 	I could be pencilling
you could be pencilling
he could be pencilling
we could be pencilling
you could be pencilling
they could be pencilling	I could have pencilled
you could have pencilled
he could have pencilled
we could have pencilled
you could have pencilled
they could have pencilled	I could have been pencilling
you could have been pencilling
he could have been pencilling
we could have been pencilling
you could have been pencilling
they could have been pencilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't pencil
you couldn't pencil
he couldn't pencil
we couldn't pencil
you couldn't pencil
they couldn't pencil 	I couldn't be pencilling
you couldn't be pencilling
he couldn't be pencilling
we couldn't be pencilling
you couldn't be pencilling
they couldn't be pencilling	I couldn't have pencilled
you couldn't have pencilled
he couldn't have pencilled
we couldn't have pencilled
you couldn't have pencilled
they couldn't have pencilled	I couldn't have been pencilling
you couldn't have been pencilling
he couldn't have been pencilling
we couldn't have been pencilling
you couldn't have been pencilling
they couldn't have been pencilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pencil?
could you pencil?
could he pencil?
could we pencil?
could you pencil?
could they pencil? 	could I be pencilling?
could you be pencilling?
could he be pencilling?
could we be pencilling?
could you be pencilling?
could they be pencilling? 	could I have pencilled?
could you have pencilled?
could he have pencilled?
could we have pencilled?
could you have pencilled?
could they have pencilled? 	could I have been pencilling?
could you have been pencilling?
could he have been pencilling?
could we have been pencilling?
could you have been pencilling?
could they have been pencilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I pencil?
couldn't you pencil?
couldn't he pencil?
couldn't we pencil?
couldn't you pencil?
couldn't they pencil? 	couldn't I be pencilling?
couldn't you be pencilling?
couldn't he be pencilling?
couldn't we be pencilling?
couldn't you be pencilling?
couldn't they be pencilling? 	couldn't I have pencilled?
couldn't you have pencilled?
couldn't he have pencilled?
couldn't we have pencilled?
couldn't you have pencilled?
couldn't they have pencilled? 	couldn't I have been pencilling?
couldn't you have been pencilling?
couldn't he have been pencilling?
couldn't we have been pencilling?
couldn't you have been pencilling?
couldn't they have been pencilling?