Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may fiance you may fiance he may fiance we may fiance you may fiance they may fiance
V-ing form
I may be fiancing you may be fiancing he may be fiancing we may be fiancing you may be fiancing they may be fiancing
Perfect
I may have fianced you may have fianced he may have fianced we may have fianced you may have fianced they may have fianced
V-ing perfect
I may have been fiancing you may have been fiancing he may have been fiancing we may have been fiancing you may have been fiancing they may have been fiancing
Negation
Simple form
I mayn't fiance you mayn't fiance he mayn't fiance we mayn't fiance you mayn't fiance they mayn't fiance
V-ing form
I mayn't be fiancing you mayn't be fiancing he mayn't be fiancing we mayn't be fiancing you mayn't be fiancing they mayn't be fiancing
Perfect
I mayn't have fianced you mayn't have fianced he mayn't have fianced we mayn't have fianced you mayn't have fianced they mayn't have fianced
V-ing perfect
I mayn't have been fiancing you mayn't have been fiancing he mayn't have been fiancing we mayn't have been fiancing you mayn't have been fiancing they mayn't have been fiancing
Interrogative form
Simple form
may I fiance? may you fiance? may he fiance? may we fiance? may you fiance? may they fiance?
V-ing form
may I be fiancing? may you be fiancing? may he be fiancing? may we be fiancing? may you be fiancing? may they be fiancing?
Perfect
may I have fianced? may you have fianced? may he have fianced? may we have fianced? may you have fianced? may they have fianced?
V-ing perfect
may I have been fiancing? may you have been fiancing? may he have been fiancing? may we have been fiancing? may you have been fiancing? may they have been fiancing?
Interro-negative form
Simple form
mayn't I fiance? mayn't you fiance? mayn't he fiance? mayn't we fiance? mayn't you fiance? mayn't they fiance?
V-ing form
mayn't I be fiancing? mayn't you be fiancing? mayn't he be fiancing? mayn't we be fiancing? mayn't you be fiancing? mayn't they be fiancing?
Perfect
mayn't I have fianced? mayn't you have fianced? mayn't he have fianced? mayn't we have fianced? mayn't you have fianced? mayn't they have fianced?
V-ing perfect
mayn't I have been fiancing? mayn't you have been fiancing? mayn't he have been fiancing? mayn't we have been fiancing? mayn't you have been fiancing? mayn't they have been fiancing?