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 couldn't hark you couldn't hark he couldn't hark we couldn't hark you couldn't hark they couldn't hark	I couldn't be harking you couldn't be harking he couldn't be harking we couldn't be harking you couldn't be harking they couldn't be harking
Perfect	V-ing perfect
I couldn't have harked you couldn't have harked he couldn't have harked we couldn't have harked you couldn't have harked they couldn't have harked	I couldn't have been harking you couldn't have been harking he couldn't have been harking we couldn't have been harking you couldn't have been harking they couldn't 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
couldn't I hark? couldn't you hark? couldn't he hark? couldn't we hark? couldn't you hark? couldn't they hark?	couldn't I be harking? couldn't you be harking? couldn't he be harking? couldn't we be harking? couldn't you be harking? couldn't they be harking?
Perfect	V-ing perfect
couldn't I have harked? couldn't you have harked? couldn't he have harked? couldn't we have harked? couldn't you have harked? couldn't they have harked?	couldn't I have been harking? couldn't you have been harking? couldn't he have been harking? couldn't we have been harking? couldn't you have been harking? couldn't they have been harking?