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 can't correct you can't correct she can't correct we can't correct you can't correct they can't correct
V-ing form
I can't be correcting you can't be correcting she can't be correcting we can't be correcting you can't be correcting they can't be correcting
Perfect
I can't have corrected you can't have corrected she can't have corrected we can't have corrected you can't have corrected they can't have corrected
V-ing perfect
I can't have been correcting you can't have been correcting she can't have been correcting we can't have been correcting you can't have been correcting they can't 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't I correct? can't you correct? can't she correct? can't we correct? can't you correct? can't they correct?
V-ing form
can't I be correcting? can't you be correcting? can't she be correcting? can't we be correcting? can't you be correcting? can't they be correcting?
Perfect
can't I have corrected? can't you have corrected? can't she have corrected? can't we have corrected? can't you have corrected? can't they have corrected?
V-ing perfect
can't I have been correcting? can't you have been correcting? can't she have been correcting? can't we have been correcting? can't you have been correcting? can't they have been correcting?