I must birth you must birth she must birth we must birth you must birth they must birth
Forma con V-ing
I must be birthing you must be birthing she must be birthing we must be birthing you must be birthing they must be birthing
Perfecto
I must have birthed you must have birthed she must have birthed we must have birthed you must have birthed they must have birthed
Perfecto con V-ing
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
Negación
Forma simple
I mustn't birth you mustn't birth she mustn't birth we mustn't birth you mustn't birth they mustn't birth
Forma con V-ing
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
Perfecto
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
Perfecto con V-ing
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
Forma interrogativa
Forma simple
must I birth? must you birth? must she birth? must we birth? must you birth? must they birth?
Forma con V-ing
must I be birthing? must you be birthing? must she be birthing? must we be birthing? must you be birthing? must they be birthing?
Perfecto
must I have birthed? must you have birthed? must she have birthed? must we have birthed? must you have birthed? must they have birthed?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
mustn't I birth? mustn't you birth? mustn't she birth? mustn't we birth? mustn't you birth? mustn't they birth?
Forma con V-ing
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?
Perfecto
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?
Perfecto con V-ing
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?