I can overcontribute you can overcontribute he can overcontribute we can overcontribute you can overcontribute they can overcontribute
V-ing form
I can be overcontributing you can be overcontributing he can be overcontributing we can be overcontributing you can be overcontributing they can be overcontributing
Perfect
I can have overcontributed you can have overcontributed he can have overcontributed we can have overcontributed you can have overcontributed they can have overcontributed
V-ing perfect
I can have been overcontributing you can have been overcontributing he can have been overcontributing we can have been overcontributing you can have been overcontributing they can have been overcontributing
Negation
Simple form
I cannot overcontribute you cannot overcontribute he cannot overcontribute we cannot overcontribute you cannot overcontribute they cannot overcontribute
V-ing form
I cannot be overcontributing you cannot be overcontributing he cannot be overcontributing we cannot be overcontributing you cannot be overcontributing they cannot be overcontributing
Perfect
I cannot have overcontributed you cannot have overcontributed he cannot have overcontributed we cannot have overcontributed you cannot have overcontributed they cannot have overcontributed
V-ing perfect
I cannot have been overcontributing you cannot have been overcontributing he cannot have been overcontributing we cannot have been overcontributing you cannot have been overcontributing they cannot have been overcontributing
Interrogative form
Simple form
can I overcontribute? can you overcontribute? can he overcontribute? can we overcontribute? can you overcontribute? can they overcontribute?
V-ing form
can I be overcontributing? can you be overcontributing? can he be overcontributing? can we be overcontributing? can you be overcontributing? can they be overcontributing?
Perfect
can I have overcontributed? can you have overcontributed? can he have overcontributed? can we have overcontributed? can you have overcontributed? can they have overcontributed?
V-ing perfect
can I have been overcontributing? can you have been overcontributing? can he have been overcontributing? can we have been overcontributing? can you have been overcontributing? can they have been overcontributing?
Interro-negative form
Simple form
can I not overcontribute? can you not overcontribute? can he not overcontribute? can we not overcontribute? can you not overcontribute? can they not overcontribute?
V-ing form
can I not be overcontributing? can you not be overcontributing? can he not be overcontributing? can we not be overcontributing? can you not be overcontributing? can they not be overcontributing?
Perfect
can I not have overcontributed? can you not have overcontributed? can he not have overcontributed? can we not have overcontributed? can you not have overcontributed? can they not have overcontributed?
V-ing perfect
can I not have been overcontributing? can you not have been overcontributing? can he not have been overcontributing? can we not have been overcontributing? can you not have been overcontributing? can they not have been overcontributing?