I must underfeed you must underfeed he must underfeed we must underfeed you must underfeed they must underfeed
Forma con V-ing
I must be underfeeding you must be underfeeding he must be underfeeding we must be underfeeding you must be underfeeding they must be underfeeding
Perfecto
I must have underfed you must have underfed he must have underfed we must have underfed you must have underfed they must have underfed
Perfecto con V-ing
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
Negación
Forma simple
I must not underfeed you must not underfeed he must not underfeed we must not underfeed you must not underfeed they must not underfeed
Forma con V-ing
I must not be underfeeding you must not be underfeeding he must not be underfeeding we must not be underfeeding you must not be underfeeding they must not be underfeeding
Perfecto
I must not have underfed you must not have underfed he must not have underfed we must not have underfed you must not have underfed they must not have underfed
Perfecto con V-ing
I must not have been underfeeding you must not have been underfeeding he must not have been underfeeding we must not have been underfeeding you must not have been underfeeding they must not have been underfeeding
Forma interrogativa
Forma simple
must I underfeed? must you underfeed? must he underfeed? must we underfeed? must you underfeed? must they underfeed?
Forma con V-ing
must I be underfeeding? must you be underfeeding? must he be underfeeding? must we be underfeeding? must you be underfeeding? must they be underfeeding?
Perfecto
must I have underfed? must you have underfed? must he have underfed? must we have underfed? must you have underfed? must they have underfed?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
must I not underfeed? must you not underfeed? must he not underfeed? must we not underfeed? must you not underfeed? must they not underfeed?
Forma con V-ing
must I not be underfeeding? must you not be underfeeding? must he not be underfeeding? must we not be underfeeding? must you not be underfeeding? must they not be underfeeding?
Perfecto
must I not have underfed? must you not have underfed? must he not have underfed? must we not have underfed? must you not have underfed? must they not have underfed?
Perfecto con V-ing
must I not have been underfeeding? must you not have been underfeeding? must he not have been underfeeding? must we not have been underfeeding? must you not have been underfeeding? must they not have been underfeeding?