Jesus perceived (egnw Ihsou). Second aorist active indicative of ginwskw. That they were desirous to ask him (oti hqelon auton erwtain). Imperfect active tense of qelw in indirect discourse instead of the retention of the present qelousin (the usual idiom), just like our English. Their embarrassment was manifest after four inquiries already (Peter, Thomas, Philip, Judas). So Jesus takes the initiative.