English verb conjugation
COULD HARK

Regular verb: hark - harked - harked

Affirmation

Simple form	V-ing form
I could hark you could hark he could hark we could hark you could hark they could hark	I could be harking you could be harking he could be harking we could be harking you could be harking they could be harking
Perfect	V-ing perfect
I could have harked you could have harked he could have harked we could have harked you could have harked they could have harked	I could have been harking you could have been harking he could have been harking we could have been harking you could have been harking they could have been harking

Negation

Simple form	V-ing form
I could not hark you could not hark he could not hark we could not hark you could not hark they could not hark	I could not be harking you could not be harking he could not be harking we could not be harking you could not be harking they could not be harking
Perfect	V-ing perfect
I could not have harked you could not have harked he could not have harked we could not have harked you could not have harked they could not have harked	I could not have been harking you could not have been harking he could not have been harking we could not have been harking you could not have been harking they could not have been harking

Interrogative form

Simple form	V-ing form
could I hark? could you hark? could he hark? could we hark? could you hark? could they hark?	could I be harking? could you be harking? could he be harking? could we be harking? could you be harking? could they be harking?
Perfect	V-ing perfect
could I have harked? could you have harked? could he have harked? could we have harked? could you have harked? could they have harked?	could I have been harking? could you have been harking? could he have been harking? could we have been harking? could you have been harking? could they have been harking?

Interro-negative form

Simple form	V-ing form
could I not hark? could you not hark? could he not hark? could we not hark? could you not hark? could they not hark?	could I not be harking? could you not be harking? could he not be harking? could we not be harking? could you not be harking? could they not be harking?
Perfect	V-ing perfect
could I not have harked? could you not have harked? could he not have harked? could we not have harked? could you not have harked? could they not have harked?	could I not have been harking? could you not have been harking? could he not have been harking? could we not have been harking? could you not have been harking? could they not have been harking?