{They could not find} (ouch h(8875)riskon). Imperfect active.
They kept on not finding. {What they might do} (	o ti
poi(8873)(9373)in). First aorist active deliberative subjunctive in a
direct question retained in the indirect. Note the article 	o
(neuter accusative) with the question. {Hung upon him}
(exekremeto autou). Imperfect middle of ekkremamai, an old
verb (mi form) to hang from, here only in the N.T. The form is
an omega form from ekkremomai, a constant tendency to the
omega form in the _Koin(825f). It pictures the whole nation (save
the leaders in verse  47 ) hanging upon the words of Jesus as if
in suspense in mid-air, rapt attention that angered these same
leaders. Tyndale renders it "stuck by him."