English verb conjugation
COULD ATTACK

Regular verb: attack - attacked - attacked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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