I can punch you can punch he can punch we can punch you can punch they can punch
V-ing form
I can be punching you can be punching he can be punching we can be punching you can be punching they can be punching
Perfect
I can have punched you can have punched he can have punched we can have punched you can have punched they can have punched
V-ing perfect
I can have been punching you can have been punching he can have been punching we can have been punching you can have been punching they can have been punching
Negation
Simple form
I cannot punch you cannot punch he cannot punch we cannot punch you cannot punch they cannot punch
V-ing form
I cannot be punching you cannot be punching he cannot be punching we cannot be punching you cannot be punching they cannot be punching
Perfect
I cannot have punched you cannot have punched he cannot have punched we cannot have punched you cannot have punched they cannot have punched
V-ing perfect
I cannot have been punching you cannot have been punching he cannot have been punching we cannot have been punching you cannot have been punching they cannot have been punching
Interrogative form
Simple form
can I punch? can you punch? can he punch? can we punch? can you punch? can they punch?
V-ing form
can I be punching? can you be punching? can he be punching? can we be punching? can you be punching? can they be punching?
Perfect
can I have punched? can you have punched? can he have punched? can we have punched? can you have punched? can they have punched?
V-ing perfect
can I have been punching? can you have been punching? can he have been punching? can we have been punching? can you have been punching? can they have been punching?
Interro-negative form
Simple form
can I not punch? can you not punch? can he not punch? can we not punch? can you not punch? can they not punch?
V-ing form
can I not be punching? can you not be punching? can he not be punching? can we not be punching? can you not be punching? can they not be punching?
Perfect
can I not have punched? can you not have punched? can he not have punched? can we not have punched? can you not have punched? can they not have punched?
V-ing perfect
can I not have been punching? can you not have been punching? can he not have been punching? can we not have been punching? can you not have been punching? can they not have been punching?