The source includes negation and interrogation under non-affirmative clauses.
«مَا جَاءَنِي أَحَدٌ إِلَّا زَيْدًا» is negated.
«هَلْ جَاءَ أَحَدٌ إِلَّا زَيْدٌ؟» is an added teaching illustration of interrogation.
When the exception base is stated, the book’s second rule applies.