I may refund you may refund he may refund we may refund you may refund they may refund
V-ing form
I may be refunding you may be refunding he may be refunding we may be refunding you may be refunding they may be refunding
Perfect
I may have refunded you may have refunded he may have refunded we may have refunded you may have refunded they may have refunded
V-ing perfect
I may have been refunding you may have been refunding he may have been refunding we may have been refunding you may have been refunding they may have been refunding
Negation
Simple form
I mayn't refund you mayn't refund he mayn't refund we mayn't refund you mayn't refund they mayn't refund
V-ing form
I mayn't be refunding you mayn't be refunding he mayn't be refunding we mayn't be refunding you mayn't be refunding they mayn't be refunding
Perfect
I mayn't have refunded you mayn't have refunded he mayn't have refunded we mayn't have refunded you mayn't have refunded they mayn't have refunded
V-ing perfect
I mayn't have been refunding you mayn't have been refunding he mayn't have been refunding we mayn't have been refunding you mayn't have been refunding they mayn't have been refunding
Interrogative form
Simple form
may I refund? may you refund? may he refund? may we refund? may you refund? may they refund?
V-ing form
may I be refunding? may you be refunding? may he be refunding? may we be refunding? may you be refunding? may they be refunding?
Perfect
may I have refunded? may you have refunded? may he have refunded? may we have refunded? may you have refunded? may they have refunded?
V-ing perfect
may I have been refunding? may you have been refunding? may he have been refunding? may we have been refunding? may you have been refunding? may they have been refunding?
Interro-negative form
Simple form
mayn't I refund? mayn't you refund? mayn't he refund? mayn't we refund? mayn't you refund? mayn't they refund?
V-ing form
mayn't I be refunding? mayn't you be refunding? mayn't he be refunding? mayn't we be refunding? mayn't you be refunding? mayn't they be refunding?
Perfect
mayn't I have refunded? mayn't you have refunded? mayn't he have refunded? mayn't we have refunded? mayn't you have refunded? mayn't they have refunded?
V-ing perfect
mayn't I have been refunding? mayn't you have been refunding? mayn't he have been refunding? mayn't we have been refunding? mayn't you have been refunding? mayn't they have been refunding?