إِنَّ ٱلْإِنسَـٰنَ لِرَبِّهِۦ لَكَنُودٌ ٦
Sentence structure
إِنَّ governs accusative ٱلْإِنسَـٰنَ. لِرَبِّهِۦ links to the emphatic predicate لَكَنُودٌ, whose initial لَ adds emphasis.
Ayah summary
Surely the human being is deeply ungrateful to his Lord.
إِنَّ — Indeed
Grammar: An accusative particle of emphasis.
ٱلْإِنسَـٰنَ — the human being
Grammar: A defined masculine accusative noun of إِنَّ.
لِرَبِّهِۦ — toward his Lord
Grammar: لِ is a preposition; رَبِّ is genitive and attached هِۦ possessive; the phrase is linked to كَنُودٌ.
لَكَنُودٌۭ — surely ungrateful
Grammar: Emphatic لَ prefixes an indefinite masculine nominative predicate of إِنَّ.