English verb conjugation
CAN ATTACK

Regular verb: attack - attacked - attacked

Affirmation

Simple form	V-ing form
I can attack you can attack he can attack we can attack you can attack they can attack	I can be attacking you can be attacking he can be attacking we can be attacking you can be attacking they can be attacking
Perfect	V-ing perfect
I can have attacked you can have attacked he can have attacked we can have attacked you can have attacked they can have attacked	I can have been attacking you can have been attacking he can have been attacking we can have been attacking you can have been attacking they can have been attacking

Negation

Simple form	V-ing form
I cannot attack you cannot attack he cannot attack we cannot attack you cannot attack they cannot attack	I cannot be attacking you cannot be attacking he cannot be attacking we cannot be attacking you cannot be attacking they cannot be attacking
Perfect	V-ing perfect
I cannot have attacked you cannot have attacked he cannot have attacked we cannot have attacked you cannot have attacked they cannot have attacked	I cannot have been attacking you cannot have been attacking he cannot have been attacking we cannot have been attacking you cannot have been attacking they cannot have been attacking

Interrogative form

Simple form	V-ing form
can I attack? can you attack? can he attack? can we attack? can you attack? can they attack?	can I be attacking? can you be attacking? can he be attacking? can we be attacking? can you be attacking? can they be attacking?
Perfect	V-ing perfect
can I have attacked? can you have attacked? can he have attacked? can we have attacked? can you have attacked? can they have attacked?	can I have been attacking? can you have been attacking? can he have been attacking? can we have been attacking? can you have been attacking? can they have been attacking?

Interro-negative form

Simple form	V-ing form
can I not attack? can you not attack? can he not attack? can we not attack? can you not attack? can they not attack?	can I not be attacking? can you not be attacking? can he not be attacking? can we not be attacking? can you not be attacking? can they not be attacking?
Perfect	V-ing perfect
can I not have attacked? can you not have attacked? can he not have attacked? can we not have attacked? can you not have attacked? can they not have attacked?	can I not have been attacking? can you not have been attacking? can he not have been attacking? can we not have been attacking? can you not have been attacking? can they not have been attacking?