English verb conjugation
COULD JERK

Regular verb: jerk - jerked - jerked

Affirmation

Simple form	V-ing form
I could jerk you could jerk he could jerk we could jerk you could jerk they could jerk	I could be jerking you could be jerking he could be jerking we could be jerking you could be jerking they could be jerking
Perfect	V-ing perfect
I could have jerked you could have jerked he could have jerked we could have jerked you could have jerked they could have jerked	I could have been jerking you could have been jerking he could have been jerking we could have been jerking you could have been jerking they could have been jerking

Negation

Simple form	V-ing form
I could not jerk you could not jerk he could not jerk we could not jerk you could not jerk they could not jerk	I could not be jerking you could not be jerking he could not be jerking we could not be jerking you could not be jerking they could not be jerking
Perfect	V-ing perfect
I could not have jerked you could not have jerked he could not have jerked we could not have jerked you could not have jerked they could not have jerked	I could not have been jerking you could not have been jerking he could not have been jerking we could not have been jerking you could not have been jerking they could not have been jerking

Interrogative form

Simple form	V-ing form
could I jerk? could you jerk? could he jerk? could we jerk? could you jerk? could they jerk?	could I be jerking? could you be jerking? could he be jerking? could we be jerking? could you be jerking? could they be jerking?
Perfect	V-ing perfect
could I have jerked? could you have jerked? could he have jerked? could we have jerked? could you have jerked? could they have jerked?	could I have been jerking? could you have been jerking? could he have been jerking? could we have been jerking? could you have been jerking? could they have been jerking?

Interro-negative form

Simple form	V-ing form
could I not jerk? could you not jerk? could he not jerk? could we not jerk? could you not jerk? could they not jerk?	could I not be jerking? could you not be jerking? could he not be jerking? could we not be jerking? could you not be jerking? could they not be jerking?
Perfect	V-ing perfect
could I not have jerked? could you not have jerked? could he not have jerked? could we not have jerked? could you not have jerked? could they not have jerked?	could I not have been jerking? could you not have been jerking? could he not have been jerking? could we not have been jerking? could you not have been jerking? could they not have been jerking?