Two pieces of equipment moving in opposite directions
1Ara and Min are preparing photographs for a club exhibition. Yesterday, Ara lent a tripod to Min. The tripod belongs to Ara, but Min needs it for photographs that he will take tomorrow. He borrowed it from her with a promise to return it on Friday. At the time of this report, he has not returned it yet. The arrangement allows temporary use; it does not make Min the owner.
2A different piece of equipment moved in the opposite direction on the same day. Ara borrowed a reflector from Min. Min owns the reflector and does not need it this week, so he lent it to Ara. She plans to use it indoors and return it on Thursday. The two friends therefore cannot be described simply as one permanent lender and one permanent borrower. Their roles depend on which object is being discussed.
3A club member prepares a record but writes that Min lent the tripod to Ara yesterday. Ara explains that this sentence reverses the first transfer. The member rewrites it with Min as the receiver: "Min borrowed a tripod from Ara yesterday." He then checks the reflector record separately instead of copying the names from the tripod sentence. He also keeps the planned return dates separate from completed actions. A promise to return something is not proof that it has already been returned. Before finishing, he draws one arrow for each object and checks that both English descriptions of each transfer match the same arrow.