In ᴹQ. Fíriel’s Song from the 1930s there are signs of a “stative” verb inflection, though I don’t know who coined this term for this particular Quenya construction. This song has nouns and adjectives with the verb “to be” directly attached in the form of the suffix -ie (LR/72):

• ᴹQ. mannar Valion: númessier “the hands of the Lords: they are in the West”; núme-sse-ie-r = “west-(locative)-is-(plural)”.
• ᴹQ. enga morion: talantie “save the dark one: he is fallen”; talant(a)-ie = “fallen-is”.
• ᴹQ. Melko Mardello lende: márie: “Melko has gone from Earth: it is good”; már(a)-ie = “good-is”.
• ᴹQ. toi aina, mána, meldielto “they are holy, blessed, and beloved”; meld(a)-ie-lto = “beloved-is-they”.
• ᴹQ. íre ilqa yéva nótina, hostainiéva “when all is counted, and all [will be] numbered”; hostain(a)-ie-va = “numbered-is-(future)”.

In these examples, there is either (a) no subject as már(a)-ie = “it is good”, (b) a pronominal subject suffix as meld(a)-ie-lto = “they are beloved” or (c) an implied subject from another phrase as ilqa yéva nótina, hostainiéva “all are counted, [all] numbered”. As seen in this last example, where the subject is explicit and not a pronoun, the “to be” verb (yéva) is expressed separately as a joining verb between the subject and predicate; this is true elsewhere in the poem as well.

An earlier version of this system appeared in Qenya Word-lists from the 1920s, as the suffix -ya added to adjectives and participles: márea = mára + ya “is good”, qalinya “is dying”, narkea “is dead”, ninqia “is white”; all of these are connected to a root ī “be” (PE16/140). A variant suffix -nye was used for the past tense (PE16/141). The later version of the stative suffix appearing in Fíriel’s Song is probably connected to an updated version of the root, ᴹ√YĒ or ᴹ√Ī from The Etymologies, as suggested by Carl Hostetter and Patrick Wynne (VT46/22).

Something resembling the stative appears in the Quenya Verbal System (QVS) of the late 1940s:

Coalescent forms: used where neither pronoun nor verb are specially emphasized.
Sg. 1. nie or ní; 2a. kie, b. lie; 3a. ie, b. thie ... (PE22/123 note #130).

These examples are the pronoun + ye, also with plural forms (mier = me + ye + r), past forms (níne = ni + ne) and future forms (níva = ni + va). But this entire section was rejected when Tolkien changed the “to be” verb from ye- to ea- (PE22/122). It is hard to be sure if these are properly “statives”, since in QVS pronominal subject prefixes were the norm. There is no sign of the stative after this.

Neo-Quenya: Both the verb ye- and this specific construction were abandoned in later writing, make this inflection inappropriate for Neo-Quenya.