I can correct you can correct she can correct we can correct you can correct they can correct
V-ing form
I can be correcting you can be correcting she can be correcting we can be correcting you can be correcting they can be correcting
Perfect
I can have corrected you can have corrected she can have corrected we can have corrected you can have corrected they can have corrected
V-ing perfect
I can have been correcting you can have been correcting she can have been correcting we can have been correcting you can have been correcting they can have been correcting
Negation
Simple form
I cannot correct you cannot correct she cannot correct we cannot correct you cannot correct they cannot correct
V-ing form
I cannot be correcting you cannot be correcting she cannot be correcting we cannot be correcting you cannot be correcting they cannot be correcting
Perfect
I cannot have corrected you cannot have corrected she cannot have corrected we cannot have corrected you cannot have corrected they cannot have corrected
V-ing perfect
I cannot have been correcting you cannot have been correcting she cannot have been correcting we cannot have been correcting you cannot have been correcting they cannot have been correcting
Interrogative form
Simple form
can I correct? can you correct? can she correct? can we correct? can you correct? can they correct?
V-ing form
can I be correcting? can you be correcting? can she be correcting? can we be correcting? can you be correcting? can they be correcting?
Perfect
can I have corrected? can you have corrected? can she have corrected? can we have corrected? can you have corrected? can they have corrected?
V-ing perfect
can I have been correcting? can you have been correcting? can she have been correcting? can we have been correcting? can you have been correcting? can they have been correcting?
Interro-negative form
Simple form
can I not correct? can you not correct? can she not correct? can we not correct? can you not correct? can they not correct?
V-ing form
can I not be correcting? can you not be correcting? can she not be correcting? can we not be correcting? can you not be correcting? can they not be correcting?
Perfect
can I not have corrected? can you not have corrected? can she not have corrected? can we not have corrected? can you not have corrected? can they not have corrected?
V-ing perfect
can I not have been correcting? can you not have been correcting? can she not have been correcting? can we not have been correcting? can you not have been correcting? can they not have been correcting?