Rule reminder

Bisogna, occorre, and basta are impersonal verbs used in the 3rd person singular when followed by an infinitive or che + subjunctive. Bisogna/occorre = it is necessary. Basta = it is enough / just. Note: unlike bisogna, occorre (like bastare) agrees in number when its subject is a plural noun instead of an infinitive (occorrono due ore, bastano due euro).