I can black you can black she can black we can black you can black they can black
V-ing form
I can be blacking you can be blacking she can be blacking we can be blacking you can be blacking they can be blacking
Perfect
I can have blacked you can have blacked she can have blacked we can have blacked you can have blacked they can have blacked
V-ing perfect
I can have been blacking you can have been blacking she can have been blacking we can have been blacking you can have been blacking they can have been blacking
Negation
Simple form
I cannot black you cannot black she cannot black we cannot black you cannot black they cannot black
V-ing form
I cannot be blacking you cannot be blacking she cannot be blacking we cannot be blacking you cannot be blacking they cannot be blacking
Perfect
I cannot have blacked you cannot have blacked she cannot have blacked we cannot have blacked you cannot have blacked they cannot have blacked
V-ing perfect
I cannot have been blacking you cannot have been blacking she cannot have been blacking we cannot have been blacking you cannot have been blacking they cannot have been blacking
Interrogative form
Simple form
can I black? can you black? can she black? can we black? can you black? can they black?
V-ing form
can I be blacking? can you be blacking? can she be blacking? can we be blacking? can you be blacking? can they be blacking?
Perfect
can I have blacked? can you have blacked? can she have blacked? can we have blacked? can you have blacked? can they have blacked?
V-ing perfect
can I have been blacking? can you have been blacking? can she have been blacking? can we have been blacking? can you have been blacking? can they have been blacking?
Interro-negative form
Simple form
can I not black? can you not black? can she not black? can we not black? can you not black? can they not black?
V-ing form
can I not be blacking? can you not be blacking? can she not be blacking? can we not be blacking? can you not be blacking? can they not be blacking?
Perfect
can I not have blacked? can you not have blacked? can she not have blacked? can we not have blacked? can you not have blacked? can they not have blacked?
V-ing perfect
can I not have been blacking? can you not have been blacking? can she not have been blacking? can we not have been blacking? can you not have been blacking? can they not have been blacking?