Rule reminder
In complex sentences, 'come se' can appear in subordinate clauses within larger structures. The subjunctive rule still applies: imperfetto for present unreality, trapassato for past unreality. Identify the main verb's tense to choose the right tense after 'come se'.
Tutti nella stanza se ne accorsero: lui stava guardando il vuoto come se ___ altrove con la mente.