أَيَحْسَبُ أَن لَّن يَقْدِرَ عَلَيْهِ أَحَدٌۭ
Sentence structure
أَ opens the question; يَحْسَبُ has understood subject هُوَ. The clause أَن لَّن يَقْدِرَ عَلَيْهِ أَحَدٌ is its object; لَّن makes يَقْدِرَ subjunctive and أَحَدٌ is that verb's subject.
Ayah summary
Does he think that no one will be able to overpower him?
أَيَحْسَبُ — Does he think
Grammar: أَ is interrogative; يَحْسَبُ is a third-person masculine-singular indicative imperfect with understood subject هُوَ.
أَن — that
Grammar: A subordinating/source particle introducing the clause that functions as the object of يَحْسَبُ.
لَّن — not
Grammar: A particle of future negation and subjunctive governing يَقْدِرَ.
يَقْدِرَ — has power
Grammar: A third-person masculine-singular imperfect, subjunctive after لَّن.
عَلَيْهِ — over him
Grammar: عَلَىٰ is a preposition and attached هِ a masculine-singular pronoun in the genitive position. This phrase is linked to «يَقْدِرَ».
أَحَدٌۭ — anyone
Grammar: An indefinite masculine-singular nominative subject of يَقْدِرَ.