English verb conjugation
MUST BIRTH

Regular verb: birth - birthed - birthed

Affirmation

Simple form	V-ing form
I must birth you must birth she must birth we must birth you must birth they must birth	I must be birthing you must be birthing she must be birthing we must be birthing you must be birthing they must be birthing
Perfect	V-ing perfect
I must have birthed you must have birthed she must have birthed we must have birthed you must have birthed they must have birthed	I must have been birthing you must have been birthing she must have been birthing we must have been birthing you must have been birthing they must have been birthing

Negation

Simple form	V-ing form
I mustn't birth you mustn't birth she mustn't birth we mustn't birth you mustn't birth they mustn't birth	I mustn't be birthing you mustn't be birthing she mustn't be birthing we mustn't be birthing you mustn't be birthing they mustn't be birthing
Perfect	V-ing perfect
I mustn't have birthed you mustn't have birthed she mustn't have birthed we mustn't have birthed you mustn't have birthed they mustn't have birthed	I mustn't have been birthing you mustn't have been birthing she mustn't have been birthing we mustn't have been birthing you mustn't have been birthing they mustn't have been birthing

Interrogative form

Simple form	V-ing form
must I birth? must you birth? must she birth? must we birth? must you birth? must they birth?	must I be birthing? must you be birthing? must she be birthing? must we be birthing? must you be birthing? must they be birthing?
Perfect	V-ing perfect
must I have birthed? must you have birthed? must she have birthed? must we have birthed? must you have birthed? must they have birthed?	must I have been birthing? must you have been birthing? must she have been birthing? must we have been birthing? must you have been birthing? must they have been birthing?

Interro-negative form

Simple form	V-ing form
mustn't I birth? mustn't you birth? mustn't she birth? mustn't we birth? mustn't you birth? mustn't they birth?	mustn't I be birthing? mustn't you be birthing? mustn't she be birthing? mustn't we be birthing? mustn't you be birthing? mustn't they be birthing?
Perfect	V-ing perfect
mustn't I have birthed? mustn't you have birthed? mustn't she have birthed? mustn't we have birthed? mustn't you have birthed? mustn't they have birthed?	mustn't I have been birthing? mustn't you have been birthing? mustn't she have been birthing? mustn't we have been birthing? mustn't you have been birthing? mustn't they have been birthing?