English verb conjugation
COULD BLACK

Regular verb: black - blacked - blacked

Affirmation

Simple form	V-ing form
I could black you could black she could black we could black you could black they could black	I could be blacking you could be blacking she could be blacking we could be blacking you could be blacking they could be blacking
Perfect	V-ing perfect
I could have blacked you could have blacked she could have blacked we could have blacked you could have blacked they could have blacked	I could have been blacking you could have been blacking she could have been blacking we could have been blacking you could have been blacking they could have been blacking

Negation

Simple form	V-ing form
I couldn't black you couldn't black she couldn't black we couldn't black you couldn't black they couldn't black	I couldn't be blacking you couldn't be blacking she couldn't be blacking we couldn't be blacking you couldn't be blacking they couldn't be blacking
Perfect	V-ing perfect
I couldn't have blacked you couldn't have blacked she couldn't have blacked we couldn't have blacked you couldn't have blacked they couldn't have blacked	I couldn't have been blacking you couldn't have been blacking she couldn't have been blacking we couldn't have been blacking you couldn't have been blacking they couldn't have been blacking

Interrogative form

Simple form	V-ing form
could I black? could you black? could she black? could we black? could you black? could they black?	could I be blacking? could you be blacking? could she be blacking? could we be blacking? could you be blacking? could they be blacking?
Perfect	V-ing perfect
could I have blacked? could you have blacked? could she have blacked? could we have blacked? could you have blacked? could they have blacked?	could I have been blacking? could you have been blacking? could she have been blacking? could we have been blacking? could you have been blacking? could they have been blacking?

Interro-negative form

Simple form	V-ing form
couldn't I black? couldn't you black? couldn't she black? couldn't we black? couldn't you black? couldn't they black?	couldn't I be blacking? couldn't you be blacking? couldn't she be blacking? couldn't we be blacking? couldn't you be blacking? couldn't they be blacking?
Perfect	V-ing perfect
couldn't I have blacked? couldn't you have blacked? couldn't she have blacked? couldn't we have blacked? couldn't you have blacked? couldn't they have blacked?	couldn't I have been blacking? couldn't you have been blacking? couldn't she have been blacking? couldn't we have been blacking? couldn't you have been blacking? couldn't they have been blacking?