lui riuscisse

managed to, succeeded in

→ riuscire
riusc to succeed; to manage (to do something) + isse 3rd-person singular imperfect subjunctive
verb · third singular · imperfect subjunctive Rare #43,528
managed to, succeeded in Used in the imperfect subjunctive, often after expressions like "se" (if) or "speravo che" (I hoped that).
IT: Speravo che riuscisse a finire il lavoro oggi.
EN: I hoped that he/she would manage to finish the work today.
Conjugation of riuscire
Subjunctive imperfect
SingularPlural
Third riuscisse

Pensavo che Tom riuscisse ad aiutare.

I thought Tom could help.

Io vorrei che mia moglie riuscisse a cucinare.

I wish my wife could cook.

Tom pensava che Mary lo riuscisse a fare.

Tom thought Mary could do it.

Non pensavo che Tom riuscisse a vincere.

I didn't think Tom could win.