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