English verb conjugation
MUST HEARKEN

Regular verb: hearken - hearkened - hearkened

Affirmation

Simple form	V-ing form
I must hearken you must hearken he must hearken we must hearken you must hearken they must hearken	I must be hearkening you must be hearkening he 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 he 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 he 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 mustn't hearken you mustn't hearken he mustn't hearken we mustn't hearken you mustn't hearken they mustn't hearken	I mustn't be hearkening you mustn't be hearkening he mustn't be hearkening we mustn't be hearkening you mustn't be hearkening they mustn't be hearkening
Perfect	V-ing perfect
I mustn't have hearkened you mustn't have hearkened he mustn't have hearkened we mustn't have hearkened you mustn't have hearkened they mustn't have hearkened	I mustn't have been hearkening you mustn't have been hearkening he mustn't have been hearkening we mustn't have been hearkening you mustn't have been hearkening they mustn't have been hearkening

Interrogative form

Simple form	V-ing form
must I hearken? must you hearken? must he hearken? must we hearken? must you hearken? must they hearken?	must I be hearkening? must you be hearkening? must he 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 he 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 he 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
mustn't I hearken? mustn't you hearken? mustn't he hearken? mustn't we hearken? mustn't you hearken? mustn't they hearken?	mustn't I be hearkening? mustn't you be hearkening? mustn't he be hearkening? mustn't we be hearkening? mustn't you be hearkening? mustn't they be hearkening?
Perfect	V-ing perfect
mustn't I have hearkened? mustn't you have hearkened? mustn't he have hearkened? mustn't we have hearkened? mustn't you have hearkened? mustn't they have hearkened?	mustn't I have been hearkening? mustn't you have been hearkening? mustn't he have been hearkening? mustn't we have been hearkening? mustn't you have been hearkening? mustn't they have been hearkening?