English verb conjugation
CAN BLACK

Regular verb: black - blacked - blacked

Affirmation

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

Negation

Simple form	V-ing form
I cannot black you cannot black he cannot black we cannot black you cannot black they cannot black	I cannot be blacking you cannot be blacking he cannot be blacking we cannot be blacking you cannot be blacking they cannot be blacking
Perfect	V-ing perfect
I cannot have blacked you cannot have blacked he cannot have blacked we cannot have blacked you cannot have blacked they cannot have blacked	I cannot have been blacking you cannot have been blacking he cannot have been blacking we cannot have been blacking you cannot have been blacking they cannot have been blacking

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can I not black? can you not black? can he not black? can we not black? can you not black? can they not black?	can I not be blacking? can you not be blacking? can he not be blacking? can we not be blacking? can you not be blacking? can they not be blacking?
Perfect	V-ing perfect
can I not have blacked? can you not have blacked? can he not have blacked? can we not have blacked? can you not have blacked? can they not have blacked?	can I not have been blacking? can you not have been blacking? can he not have been blacking? can we not have been blacking? can you not have been blacking? can they not have been blacking?