According to Islamic scholars, if a person does not perform the Sunnah prayer before the Fardh prayer and performs it afterward, that Sunnah prayer will still be counted as ada (performed on time). The reason is that the time for the Sunnah before the Fardh prayer begins when the Fardh time starts and remains until the Fardh time ends. However, it is mustahab (recommended) to perform the Sunnah before the Fardh prayer.