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 can't fiance you can't fiance she 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 she 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 she 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 she 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 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't I fiance? can't you fiance? can't she 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 she 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 she 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 she have been fiancing? can't we have been fiancing? can't you have been fiancing? can't they have been fiancing?