I can attack you can attack she can attack we can attack you can attack they can attack
V-ing form
I can be attacking you can be attacking she can be attacking we can be attacking you can be attacking they can be attacking
Perfect
I can have attacked you can have attacked she can have attacked we can have attacked you can have attacked they can have attacked
V-ing perfect
I can have been attacking you can have been attacking she can have been attacking we can have been attacking you can have been attacking they can have been attacking
Negation
Simple form
I can't attack you can't attack she can't attack we can't attack you can't attack they can't attack
V-ing form
I can't be attacking you can't be attacking she can't be attacking we can't be attacking you can't be attacking they can't be attacking
Perfect
I can't have attacked you can't have attacked she can't have attacked we can't have attacked you can't have attacked they can't have attacked
V-ing perfect
I can't have been attacking you can't have been attacking she can't have been attacking we can't have been attacking you can't have been attacking they can't have been attacking
Interrogative form
Simple form
can I attack? can you attack? can she attack? can we attack? can you attack? can they attack?
V-ing form
can I be attacking? can you be attacking? can she be attacking? can we be attacking? can you be attacking? can they be attacking?
Perfect
can I have attacked? can you have attacked? can she have attacked? can we have attacked? can you have attacked? can they have attacked?
V-ing perfect
can I have been attacking? can you have been attacking? can she have been attacking? can we have been attacking? can you have been attacking? can they have been attacking?
Interro-negative form
Simple form
can't I attack? can't you attack? can't she attack? can't we attack? can't you attack? can't they attack?
V-ing form
can't I be attacking? can't you be attacking? can't she be attacking? can't we be attacking? can't you be attacking? can't they be attacking?
Perfect
can't I have attacked? can't you have attacked? can't she have attacked? can't we have attacked? can't you have attacked? can't they have attacked?
V-ing perfect
can't I have been attacking? can't you have been attacking? can't she have been attacking? can't we have been attacking? can't you have been attacking? can't they have been attacking?