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