Aspect has been a central focus in linguistics due to its complexity in second language acquisition. This study explores how Jordanian Arabic speakers (L1) learning French (L2) acquire aspect, specifically how they interpret perfective verbs combined with the time expression IL Y A in French. The construction allows a subset reading in French, unlike Jordanian Arabic, which allows both subset and superset readings. The Subset Principle predicts that learners will follow the subset reading in French, while the Transfer Theory suggests they might also apply the superset reading from their L1. Results from a group of 20 Jordanian learners of French show that most follow the Subset Principle, while a minority exhibit behavior consistent with the Transfer Theory. These findings demonstrate the influence of L1 on L2 acquisition and contribute to understanding the general problem of L2 language acquisition.