English verb conjugation
MUST UNDERFEED

Irregular verb: underfeed - underfed - underfed

Affirmation

Simple form	V-ing form
I must underfeed you must underfeed he must underfeed we must underfeed you must underfeed they must underfeed	I must be underfeeding you must be underfeeding he must be underfeeding we must be underfeeding you must be underfeeding they must be underfeeding
Perfect	V-ing perfect
I must have underfed you must have underfed he must have underfed we must have underfed you must have underfed they must have underfed	I must have been underfeeding you must have been underfeeding he must have been underfeeding we must have been underfeeding you must have been underfeeding they must have been underfeeding

Negation

Simple form	V-ing form
I mustn't underfeed you mustn't underfeed he mustn't underfeed we mustn't underfeed you mustn't underfeed they mustn't underfeed	I mustn't be underfeeding you mustn't be underfeeding he mustn't be underfeeding we mustn't be underfeeding you mustn't be underfeeding they mustn't be underfeeding
Perfect	V-ing perfect
I mustn't have underfed you mustn't have underfed he mustn't have underfed we mustn't have underfed you mustn't have underfed they mustn't have underfed	I mustn't have been underfeeding you mustn't have been underfeeding he mustn't have been underfeeding we mustn't have been underfeeding you mustn't have been underfeeding they mustn't have been underfeeding

Interrogative form

Simple form	V-ing form
must I underfeed? must you underfeed? must he underfeed? must we underfeed? must you underfeed? must they underfeed?	must I be underfeeding? must you be underfeeding? must he be underfeeding? must we be underfeeding? must you be underfeeding? must they be underfeeding?
Perfect	V-ing perfect
must I have underfed? must you have underfed? must he have underfed? must we have underfed? must you have underfed? must they have underfed?	must I have been underfeeding? must you have been underfeeding? must he have been underfeeding? must we have been underfeeding? must you have been underfeeding? must they have been underfeeding?

Interro-negative form

Simple form	V-ing form
mustn't I underfeed? mustn't you underfeed? mustn't he underfeed? mustn't we underfeed? mustn't you underfeed? mustn't they underfeed?	mustn't I be underfeeding? mustn't you be underfeeding? mustn't he be underfeeding? mustn't we be underfeeding? mustn't you be underfeeding? mustn't they be underfeeding?
Perfect	V-ing perfect
mustn't I have underfed? mustn't you have underfed? mustn't he have underfed? mustn't we have underfed? mustn't you have underfed? mustn't they have underfed?	mustn't I have been underfeeding? mustn't you have been underfeeding? mustn't he have been underfeeding? mustn't we have been underfeeding? mustn't you have been underfeeding? mustn't they have been underfeeding?