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 cannot tutor you cannot tutor she cannot tutor we cannot tutor you cannot tutor they cannot tutor
V-ing form
I cannot be tutoring you cannot be tutoring she cannot be tutoring we cannot be tutoring you cannot be tutoring they cannot be tutoring
Perfect
I cannot have tutored you cannot have tutored she cannot have tutored we cannot have tutored you cannot have tutored they cannot have tutored
V-ing perfect
I cannot have been tutoring you cannot have been tutoring she cannot have been tutoring we cannot have been tutoring you cannot have been tutoring they cannot 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 I not tutor? can you not tutor? can she not tutor? can we not tutor? can you not tutor? can they not tutor?
V-ing form
can I not be tutoring? can you not be tutoring? can she not be tutoring? can we not be tutoring? can you not be tutoring? can they not be tutoring?
Perfect
can I not have tutored? can you not have tutored? can she not have tutored? can we not have tutored? can you not have tutored? can they not have tutored?
V-ing perfect
can I not have been tutoring? can you not have been tutoring? can she not have been tutoring? can we not have been tutoring? can you not have been tutoring? can they not have been tutoring?