English verb conjugation
COULD PENCIL

Regular verb: pencil - pencilled - pencilled

Affirmation

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