English verb conjugation
MUST HEARKEN

Regular verb: hearken - hearkened - hearkened

Affirmation

Simple form	V-ing form
I must hearken you must hearken she must hearken we must hearken you must hearken they must hearken	I must be hearkening you must be hearkening she must be hearkening we must be hearkening you must be hearkening they must be hearkening
Perfect	V-ing perfect
I must have hearkened you must have hearkened she must have hearkened we must have hearkened you must have hearkened they must have hearkened	I must have been hearkening you must have been hearkening she must have been hearkening we must have been hearkening you must have been hearkening they must have been hearkening

Negation

Simple form	V-ing form
I must not hearken you must not hearken she must not hearken we must not hearken you must not hearken they must not hearken	I must not be hearkening you must not be hearkening she must not be hearkening we must not be hearkening you must not be hearkening they must not be hearkening
Perfect	V-ing perfect
I must not have hearkened you must not have hearkened she must not have hearkened we must not have hearkened you must not have hearkened they must not have hearkened	I must not have been hearkening you must not have been hearkening she must not have been hearkening we must not have been hearkening you must not have been hearkening they must not have been hearkening

Interrogative form

Simple form	V-ing form
must I hearken? must you hearken? must she hearken? must we hearken? must you hearken? must they hearken?	must I be hearkening? must you be hearkening? must she be hearkening? must we be hearkening? must you be hearkening? must they be hearkening?
Perfect	V-ing perfect
must I have hearkened? must you have hearkened? must she have hearkened? must we have hearkened? must you have hearkened? must they have hearkened?	must I have been hearkening? must you have been hearkening? must she have been hearkening? must we have been hearkening? must you have been hearkening? must they have been hearkening?

Interro-negative form

Simple form	V-ing form
must I not hearken? must you not hearken? must she not hearken? must we not hearken? must you not hearken? must they not hearken?	must I not be hearkening? must you not be hearkening? must she not be hearkening? must we not be hearkening? must you not be hearkening? must they not be hearkening?
Perfect	V-ing perfect
must I not have hearkened? must you not have hearkened? must she not have hearkened? must we not have hearkened? must you not have hearkened? must they not have hearkened?	must I not have been hearkening? must you not have been hearkening? must she not have been hearkening? must we not have been hearkening? must you not have been hearkening? must they not have been hearkening?