What is the grammatical parsing of "Kufu" in Surat al-Ikhlas.

The Shaykh : Okay, in the parsing of the surah, what is the parsing of "Kufu"? Who knows the parsing of "Kufu"?
The student: A predicate.

The Shaykh : What is the predicate?
The student: The predicate of "yakun."

The Shaykh : "Yakun" is "kana," and where is "kana"?
The student: ... .

The Shaykh : The predicate of "yakun," how is it a predicate?
The student: "Lam yakun kufu."
The student: The predicate of "yakun" is the incomplete "kana."

The Shaykh : The predicate of "yakun."
The student: It is the predicate of "kana."

The Shaykh : "Yakun" is "yakun."
The student: Or it is an attribute that was placed before the described noun; it was placed before the described noun.

The Shaykh : Okay, "ahad" is in the nominative case, so how is the attribute in the accusative case while the described noun is in the nominative case?
The student: Because if what is supposed to be delayed comes first, and what is supposed to come first is delayed, it becomes accusative.
The student: It is the predicate of "yakun," not the subject of "ahad."

The Shaykh : What do you say? Hmm.
The student: An attribute.

The Shaykh : An attribute of what?
The student: An attribute of "ahad."

The Shaykh : No, Shaykh, it is a preposition and a genitive noun connected to a deleted state from "kufu," because the preposition and genitive noun come first; when the preposition and genitive noun come before an indefinite noun, it becomes a state from it, meaning "lam yakun ahad kufu" as a state of it being for Him.
It is also permissible to parse "lahu" as the predicate of "yakun," yes, it is permissible, okay.