Greek ἐξεπλήσσοντο is a single imperfect passive verb ('they were astonished'); the Peshitta renders this periphrastically with predicate ܬܡܝܗܝܢ ('astonished/marvelling') plus the auxiliary ܗܘܘ ('were'), a standard Syriac construction for past durative states. The Vulgate stupebant matches the Greek single-verb imperfect.