I must refund you must refund he must refund we must refund you must refund they must refund
Forma con V-ing
I must be refunding you must be refunding he must be refunding we must be refunding you must be refunding they must be refunding
Perfecto
I must have refunded you must have refunded he must have refunded we must have refunded you must have refunded they must have refunded
Perfecto con V-ing
I must have been refunding you must have been refunding he must have been refunding we must have been refunding you must have been refunding they must have been refunding
Negación
Forma simple
I mustn't refund you mustn't refund he mustn't refund we mustn't refund you mustn't refund they mustn't refund
Forma con V-ing
I mustn't be refunding you mustn't be refunding he mustn't be refunding we mustn't be refunding you mustn't be refunding they mustn't be refunding
Perfecto
I mustn't have refunded you mustn't have refunded he mustn't have refunded we mustn't have refunded you mustn't have refunded they mustn't have refunded
Perfecto con V-ing
I mustn't have been refunding you mustn't have been refunding he mustn't have been refunding we mustn't have been refunding you mustn't have been refunding they mustn't have been refunding
Forma interrogativa
Forma simple
must I refund? must you refund? must he refund? must we refund? must you refund? must they refund?
Forma con V-ing
must I be refunding? must you be refunding? must he be refunding? must we be refunding? must you be refunding? must they be refunding?
Perfecto
must I have refunded? must you have refunded? must he have refunded? must we have refunded? must you have refunded? must they have refunded?
Perfecto con V-ing
must I have been refunding? must you have been refunding? must he have been refunding? must we have been refunding? must you have been refunding? must they have been refunding?
Forma interro-negativa
Forma simple
mustn't I refund? mustn't you refund? mustn't he refund? mustn't we refund? mustn't you refund? mustn't they refund?
Forma con V-ing
mustn't I be refunding? mustn't you be refunding? mustn't he be refunding? mustn't we be refunding? mustn't you be refunding? mustn't they be refunding?
Perfecto
mustn't I have refunded? mustn't you have refunded? mustn't he have refunded? mustn't we have refunded? mustn't you have refunded? mustn't they have refunded?
Perfecto con V-ing
mustn't I have been refunding? mustn't you have been refunding? mustn't he have been refunding? mustn't we have been refunding? mustn't you have been refunding? mustn't they have been refunding?