I must feed you must feed he must feed we must feed you must feed they must feed
Forma con V-ing
I must be feeding you must be feeding he must be feeding we must be feeding you must be feeding they must be feeding
Perfecto
I must have fed you must have fed he must have fed we must have fed you must have fed they must have fed
Perfecto con V-ing
I must have been feeding you must have been feeding he must have been feeding we must have been feeding you must have been feeding they must have been feeding
Negación
Forma simple
I must not feed you must not feed he must not feed we must not feed you must not feed they must not feed
Forma con V-ing
I must not be feeding you must not be feeding he must not be feeding we must not be feeding you must not be feeding they must not be feeding
Perfecto
I must not have fed you must not have fed he must not have fed we must not have fed you must not have fed they must not have fed
Perfecto con V-ing
I must not have been feeding you must not have been feeding he must not have been feeding we must not have been feeding you must not have been feeding they must not have been feeding
Forma interrogativa
Forma simple
must I feed? must you feed? must he feed? must we feed? must you feed? must they feed?
Forma con V-ing
must I be feeding? must you be feeding? must he be feeding? must we be feeding? must you be feeding? must they be feeding?
Perfecto
must I have fed? must you have fed? must he have fed? must we have fed? must you have fed? must they have fed?
Perfecto con V-ing
must I have been feeding? must you have been feeding? must he have been feeding? must we have been feeding? must you have been feeding? must they have been feeding?
Forma interro-negativa
Forma simple
must I not feed? must you not feed? must he not feed? must we not feed? must you not feed? must they not feed?
Forma con V-ing
must I not be feeding? must you not be feeding? must he not be feeding? must we not be feeding? must you not be feeding? must they not be feeding?
Perfecto
must I not have fed? must you not have fed? must he not have fed? must we not have fed? must you not have fed? must they not have fed?
Perfecto con V-ing
must I not have been feeding? must you not have been feeding? must he not have been feeding? must we not have been feeding? must you not have been feeding? must they not have been feeding?