NoAMark: The function A is not explicitly marked, while S, P, or both are marked. A is therefore marked with a zero (∅) morpheme.
(1) (én) level-et ír-ok.
I letter-acc write-prs.1sg
‘I’m writing a letter.’
(2) (én) énekel-ek.
In Hungarian, pronominal A’s (1) and S’s (2) are unmarked, while the P function is marked by the accusative suffix (1). The grammatical subject (S/A) is formally distinguishable from other elements by its zero marked nominative form and the agreement on the verb (cf. Tolcsvai Nagy 2012, 2013: 283‒312, É. Kiss 2002: 8‒14).