Rule reminder

Common errors: (1) Using indicative after 'come se' instead of congiuntivo imperfetto/trapassato. (2) Using 'senza che' + infinitive instead of 'senza che' + conjugated verb. (3) Using 'senza' + conjugated verb instead of 'senza' + infinitive (same subject). (4) Using the wrong tense of the congiuntivo after 'come se'. (5) Mismatched subjects with gerund constructions.