ثُمَّ لَتُسْـَٔلُنَّ يَوْمَئِذٍ عَنِ ٱلنَّعِيمِ ٨
Sentence structure
ثُمَّ coordinates. لَتُسْـَٔلُنَّ is an emphatic passive second-person masculine-plural imperfect. يَوْمَئِذٍ is a time adverb, while عَنِ ٱلنَّعِيمِ is a prepositional phrase linked to the questioning.
Ayah summary
Then on that day you will surely be questioned about the blessings given to you in this world.
ثُمَّ — Then
Grammar: A conjunction indicating ordered sequence with an interval.
لَتُسْـَٔلُنَّ — you will surely be questioned
Grammar: An emphatic passive second-person masculine-plural imperfect whose hidden passive subject is the pronoun «أَنْتُمْ»; initial لَ and final نَّ add emphasis.
يَوْمَئِذٍ — that Day
Grammar: An indeclinable compound time adverb in the accusative position, linked to لَتُسْـَٔلُنَّ.
عَنِ — about
Grammar: A preposition governing the following noun; عَنِ ٱلنَّعِيمِ is linked to لَتُسْـَٔلُنَّ.
ٱلنَّعِيمِ — the blessings
Grammar: A defined masculine genitive noun governed by عَنِ.