English verb conjugation
COULD HARP

Regular verb: harp - harped - harped

Affirmation

Simple form	V-ing form
I could harp you could harp she could harp we could harp you could harp they could harp	I could be harping you could be harping she could be harping we could be harping you could be harping they could be harping
Perfect	V-ing perfect
I could have harped you could have harped she could have harped we could have harped you could have harped they could have harped	I could have been harping you could have been harping she could have been harping we could have been harping you could have been harping they could have been harping

Negation

Simple form	V-ing form
I could not harp you could not harp she could not harp we could not harp you could not harp they could not harp	I could not be harping you could not be harping she could not be harping we could not be harping you could not be harping they could not be harping
Perfect	V-ing perfect
I could not have harped you could not have harped she could not have harped we could not have harped you could not have harped they could not have harped	I could not have been harping you could not have been harping she could not have been harping we could not have been harping you could not have been harping they could not have been harping

Interrogative form

Simple form	V-ing form
could I harp? could you harp? could she harp? could we harp? could you harp? could they harp?	could I be harping? could you be harping? could she be harping? could we be harping? could you be harping? could they be harping?
Perfect	V-ing perfect
could I have harped? could you have harped? could she have harped? could we have harped? could you have harped? could they have harped?	could I have been harping? could you have been harping? could she have been harping? could we have been harping? could you have been harping? could they have been harping?

Interro-negative form

Simple form	V-ing form
could I not harp? could you not harp? could she not harp? could we not harp? could you not harp? could they not harp?	could I not be harping? could you not be harping? could she not be harping? could we not be harping? could you not be harping? could they not be harping?
Perfect	V-ing perfect
could I not have harped? could you not have harped? could she not have harped? could we not have harped? could you not have harped? could they not have harped?	could I not have been harping? could you not have been harping? could she not have been harping? could we not have been harping? could you not have been harping? could they not have been harping?