English verb conjugation
COULD PECK

Regular verb: peck - pecked - pecked

Affirmation

Simple form	V-ing form
I could peck you could peck she could peck we could peck you could peck they could peck	I could be pecking you could be pecking she could be pecking we could be pecking you could be pecking they could be pecking
Perfect	V-ing perfect
I could have pecked you could have pecked she could have pecked we could have pecked you could have pecked they could have pecked	I could have been pecking you could have been pecking she could have been pecking we could have been pecking you could have been pecking they could have been pecking

Negation

Simple form	V-ing form
I could not peck you could not peck she could not peck we could not peck you could not peck they could not peck	I could not be pecking you could not be pecking she could not be pecking we could not be pecking you could not be pecking they could not be pecking
Perfect	V-ing perfect
I could not have pecked you could not have pecked she could not have pecked we could not have pecked you could not have pecked they could not have pecked	I could not have been pecking you could not have been pecking she could not have been pecking we could not have been pecking you could not have been pecking they could not have been pecking

Interrogative form

Simple form	V-ing form
could I peck? could you peck? could she peck? could we peck? could you peck? could they peck?	could I be pecking? could you be pecking? could she be pecking? could we be pecking? could you be pecking? could they be pecking?
Perfect	V-ing perfect
could I have pecked? could you have pecked? could she have pecked? could we have pecked? could you have pecked? could they have pecked?	could I have been pecking? could you have been pecking? could she have been pecking? could we have been pecking? could you have been pecking? could they have been pecking?

Interro-negative form

Simple form	V-ing form
could I not peck? could you not peck? could she not peck? could we not peck? could you not peck? could they not peck?	could I not be pecking? could you not be pecking? could she not be pecking? could we not be pecking? could you not be pecking? could they not be pecking?
Perfect	V-ing perfect
could I not have pecked? could you not have pecked? could she not have pecked? could we not have pecked? could you not have pecked? could they not have pecked?	could I not have been pecking? could you not have been pecking? could she not have been pecking? could we not have been pecking? could you not have been pecking? could they not have been pecking?