Greek ἐδίδασκεν is a simple imperfect indicative; the Peshitta renders the durative aspect periphrastically with ܡܠܦ ܗܘܐ (participle + enclitic ܗܘܐ), a characteristic Syriac construction for past continuous action. The Vulgate Docebat matches the Greek imperfect with a single inflected form.