English verb conjugation
MUST HYPHEN

Regular verb: hyphen - hyphened - hyphened

Affirmation

Simple form	V-ing form
I must hyphen you must hyphen he must hyphen we must hyphen you must hyphen they must hyphen	I must be hyphening you must be hyphening he must be hyphening we must be hyphening you must be hyphening they must be hyphening
Perfect	V-ing perfect
I must have hyphened you must have hyphened he must have hyphened we must have hyphened you must have hyphened they must have hyphened	I must have been hyphening you must have been hyphening he must have been hyphening we must have been hyphening you must have been hyphening they must have been hyphening

Negation

Simple form	V-ing form
I mustn't hyphen you mustn't hyphen he mustn't hyphen we mustn't hyphen you mustn't hyphen they mustn't hyphen	I mustn't be hyphening you mustn't be hyphening he mustn't be hyphening we mustn't be hyphening you mustn't be hyphening they mustn't be hyphening
Perfect	V-ing perfect
I mustn't have hyphened you mustn't have hyphened he mustn't have hyphened we mustn't have hyphened you mustn't have hyphened they mustn't have hyphened	I mustn't have been hyphening you mustn't have been hyphening he mustn't have been hyphening we mustn't have been hyphening you mustn't have been hyphening they mustn't have been hyphening

Interrogative form

Simple form	V-ing form
must I hyphen? must you hyphen? must he hyphen? must we hyphen? must you hyphen? must they hyphen?	must I be hyphening? must you be hyphening? must he be hyphening? must we be hyphening? must you be hyphening? must they be hyphening?
Perfect	V-ing perfect
must I have hyphened? must you have hyphened? must he have hyphened? must we have hyphened? must you have hyphened? must they have hyphened?	must I have been hyphening? must you have been hyphening? must he have been hyphening? must we have been hyphening? must you have been hyphening? must they have been hyphening?

Interro-negative form

Simple form	V-ing form
mustn't I hyphen? mustn't you hyphen? mustn't he hyphen? mustn't we hyphen? mustn't you hyphen? mustn't they hyphen?	mustn't I be hyphening? mustn't you be hyphening? mustn't he be hyphening? mustn't we be hyphening? mustn't you be hyphening? mustn't they be hyphening?
Perfect	V-ing perfect
mustn't I have hyphened? mustn't you have hyphened? mustn't he have hyphened? mustn't we have hyphened? mustn't you have hyphened? mustn't they have hyphened?	mustn't I have been hyphening? mustn't you have been hyphening? mustn't he have been hyphening? mustn't we have been hyphening? mustn't you have been hyphening? mustn't they have been hyphening?