Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can fiance you can fiance she can fiance we can fiance you can fiance they can fiance
V-ing form
I can be fiancing you can be fiancing she can be fiancing we can be fiancing you can be fiancing they can be fiancing
Perfect
I can have fianced you can have fianced she 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 she 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 she cannot fiance we cannot fiance you cannot fiance they cannot fiance
V-ing form
I cannot be fiancing you cannot be fiancing she cannot be fiancing we cannot be fiancing you cannot be fiancing they cannot be fiancing
Perfect
I cannot have fianced you cannot have fianced she 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 she 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 she fiance? can we fiance? can you fiance? can they fiance?
V-ing form
can I be fiancing? can you be fiancing? can she be fiancing? can we be fiancing? can you be fiancing? can they be fiancing?
Perfect
can I have fianced? can you have fianced? can she 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 she 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 she 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 she 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 she 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 she not have been fiancing? can we not have been fiancing? can you not have been fiancing? can they not have been fiancing?