Rule reminder

Complete summary: (1) Combined forms: mi→me, ti→te, ci→ce, vi→ve + lo/la/li/le/ne; gli/le →glie- prefix. (2) Position: before conjugated verb, or attached to infinitive/imperative. (3) Passato prossimo: past participle agrees with lo/la/li/le that precede it. (4) Imperatives: tu/voi attach; Lei precedes.