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 cannot fiance you cannot fiance he cannot fiance we cannot fiance you cannot fiance they cannot fiance
V-ing form
I cannot be fiancing you cannot be fiancing he cannot be fiancing we cannot be fiancing you cannot be fiancing they cannot be fiancing
Perfect
I cannot have fianced you cannot have fianced he cannot have fianced we cannot have fianced you cannot have fianced they cannot have fianced
V-ing perfect
I cannot have been fiancing you cannot have been fiancing he cannot have been fiancing we cannot have been fiancing you cannot have been fiancing they cannot 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 I not fiance? can you not fiance? can he not fiance? can we not fiance? can you not fiance? can they not fiance?
V-ing form
can I not be fiancing? can you not be fiancing? can he not be fiancing? can we not be fiancing? can you not be fiancing? can they not be fiancing?
Perfect
can I not have fianced? can you not have fianced? can he not have fianced? can we not have fianced? can you not have fianced? can they not have fianced?
V-ing perfect
can I not have been fiancing? can you not have been fiancing? can he not have been fiancing? can we not have been fiancing? can you not have been fiancing? can they not have been fiancing?