I can tutor you can tutor she can tutor we can tutor you can tutor they can tutor
V-ing form
I can be tutoring you can be tutoring she can be tutoring we can be tutoring you can be tutoring they can be tutoring
Perfect
I can have tutored you can have tutored she can have tutored we can have tutored you can have tutored they can have tutored
V-ing perfect
I can have been tutoring you can have been tutoring she can have been tutoring we can have been tutoring you can have been tutoring they can have been tutoring
Negation
Simple form
I can't tutor you can't tutor she can't tutor we can't tutor you can't tutor they can't tutor
V-ing form
I can't be tutoring you can't be tutoring she can't be tutoring we can't be tutoring you can't be tutoring they can't be tutoring
Perfect
I can't have tutored you can't have tutored she can't have tutored we can't have tutored you can't have tutored they can't have tutored
V-ing perfect
I can't have been tutoring you can't have been tutoring she can't have been tutoring we can't have been tutoring you can't have been tutoring they can't have been tutoring
Interrogative form
Simple form
can I tutor? can you tutor? can she tutor? can we tutor? can you tutor? can they tutor?
V-ing form
can I be tutoring? can you be tutoring? can she be tutoring? can we be tutoring? can you be tutoring? can they be tutoring?
Perfect
can I have tutored? can you have tutored? can she have tutored? can we have tutored? can you have tutored? can they have tutored?
V-ing perfect
can I have been tutoring? can you have been tutoring? can she have been tutoring? can we have been tutoring? can you have been tutoring? can they have been tutoring?
Interro-negative form
Simple form
can't I tutor? can't you tutor? can't she tutor? can't we tutor? can't you tutor? can't they tutor?
V-ing form
can't I be tutoring? can't you be tutoring? can't she be tutoring? can't we be tutoring? can't you be tutoring? can't they be tutoring?
Perfect
can't I have tutored? can't you have tutored? can't she have tutored? can't we have tutored? can't you have tutored? can't they have tutored?
V-ing perfect
can't I have been tutoring? can't you have been tutoring? can't she have been tutoring? can't we have been tutoring? can't you have been tutoring? can't they have been tutoring?