English verb conjugation
MUST REFUND

Regular verb: refund - refunded - refunded

Affirmation

Simple form	V-ing form
I must refund you must refund he must refund we must refund you must refund they must refund	I must be refunding you must be refunding he must be refunding we must be refunding you must be refunding they must be refunding
Perfect	V-ing perfect
I must have refunded you must have refunded he must have refunded we must have refunded you must have refunded they must have refunded	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

Negation

Simple form	V-ing form
I mustn't refund you mustn't refund he mustn't refund we mustn't refund you mustn't refund they mustn't refund	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
Perfect	V-ing perfect
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	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

Interrogative form

Simple form	V-ing form
must I refund? must you refund? must he refund? must we refund? must you refund? must they refund?	must I be refunding? must you be refunding? must he be refunding? must we be refunding? must you be refunding? must they be refunding?
Perfect	V-ing perfect
must I have refunded? must you have refunded? must he have refunded? must we have refunded? must you have refunded? must they have refunded?	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?

Interro-negative form

Simple form	V-ing form
mustn't I refund? mustn't you refund? mustn't he refund? mustn't we refund? mustn't you refund? mustn't they refund?	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?
Perfect	V-ing perfect
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?	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?