إِنْ هُوَ إِلَّا ذِكْرٌ لِّلْعَـٰلَمِينَ
Sentence structure
Here إِنْ is a non-governing negative particle, not a condition. هُوَ is the topic, إِلَّا restricts the meaning, and ذِكْرٌ is the nominative predicate.
Ayah summary
The Qur’an is a reminder for all people.
إِنْ — Not
Grammar: A non-governing negative particle meaning “not”; it is not conditional here.
هُوَ — it
Grammar: هُوَ is a detached third-person masculine singular pronoun functioning as the topic.
إِلَّا — (is) except
Grammar: A restrictive particle forming the negative-exceptive construction.
ذِكْرٌۭ — a reminder
Grammar: nominative noun functioning as the predicate.
لِّلْعَـٰلَمِينَ — to the worlds
Grammar: لِّ is a preposition. لْ is the definite article. genitive noun functioning as the genitive complement.