ٱلَّذِى خَلَقَكَ فَسَوَّىٰكَ فَعَدَلَكَ
Sentence structure
ٱلَّذِى is genitive as a second adjective or substitute for the Lord mentioned before. خَلَقَكَ is its relative clause; فَسَوَّىٰكَ and فَعَدَلَكَ are coordinated perfect verbs. Their understood subject refers to Him, and each attached كَ is an object.
Ayah summary
Allah created the human being, fashioned the limbs correctly, and gave the body due proportion.
ٱلَّذِى — Who
Grammar: A relative pronoun in the genitive position as a second adjective or substitute for رَبِّكَ.
خَلَقَكَ — created you
Grammar: A third-person masculine singular perfect verb; its understood subject returns to ٱلَّذِى, and attached كَ is the object.
فَسَوَّىٰكَ — then fashioned you
Grammar: فَ coordinates a Form II perfect verb; the understood subject is He and attached كَ is the object.
فَعَدَلَكَ — then balanced you
Grammar: فَ coordinates another perfect verb; the understood subject is He and attached كَ is the object.