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 couldn't harp you couldn't harp she couldn't harp we couldn't harp you couldn't harp they couldn't harp	I couldn't be harping you couldn't be harping she couldn't be harping we couldn't be harping you couldn't be harping they couldn't be harping
Perfect	V-ing perfect
I couldn't have harped you couldn't have harped she couldn't have harped we couldn't have harped you couldn't have harped they couldn't have harped	I couldn't have been harping you couldn't have been harping she couldn't have been harping we couldn't have been harping you couldn't have been harping they couldn't 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
couldn't I harp? couldn't you harp? couldn't she harp? couldn't we harp? couldn't you harp? couldn't they harp?	couldn't I be harping? couldn't you be harping? couldn't she be harping? couldn't we be harping? couldn't you be harping? couldn't they be harping?
Perfect	V-ing perfect
couldn't I have harped? couldn't you have harped? couldn't she have harped? couldn't we have harped? couldn't you have harped? couldn't they have harped?	couldn't I have been harping? couldn't you have been harping? couldn't she have been harping? couldn't we have been harping? couldn't you have been harping? couldn't they have been harping?