Sumerian grammar

Sumerian is an agglutinative language with split ergativity, in a subject-object-verb form. Its grammar behaves in the nominative–accusative as in the 1st and 2nd persons in an incomplete tense-aspect, but as ergative–absolutive in most other forms of the indicative mood.

Syntax
The basic word order is subject–object–verb; verb finality is only violated in rare instances, in poetry. The moving of a constituent towards the beginning of the phrase may be a way to highlight it, as may the addition of the copula to it. The so-called anticipatory genitive (e2-a lugal-bi "the owner of the house/temple", lit. "of the house, its owner") is common and may signal the possessor's topicality. There are various ways to express subordination, some of which have already been hinted at; they include the nominalization of a verb, which can then be followed by case morphemes and possessive pronouns (kur9-ra-ni "when he entered") and included in "prepositional" constructions (eĝer a-ma-ru ba-ur3-ra-ta "back – flood – conjugation prefix – sweep over – nominalizing suffix – [genitive suffix?] – ablative suffix" = "from the back of the Flood's sweeping-over" = "after the Flood had swept over"). Subordinating conjunctions such as ud-da "when, if", tukum-bi "if" are also used, though the coordinating conjunction u3 "and", a Semitic adoption, is rarely used. A specific problem of Sumerian syntax is posed by the numerous so-called compound verbs, which usually involve a noun immediately before the verb, forming a lexical or idiomatic unit (e.g. šu...ti, lit. "hand-approach" = "receive"; igi...du8, lit. "eye-open" = "see"). Some of them are claimed to have a special agreement pattern that they share with causative constructions: their logical object, like the causee, receives, in the verb, the directive infix, but in the noun, the dative suffix if animate and the directive if inanimate.

Nouns
The Sumerian noun is typically a one or two syllable root (igi "eye", e2 "house, household", nin "lady"), although there are also some roots with three syllables like šakanka "market". There are two grammatical genders, usually called human and non-human (the first includes gods and the word for "statue" in some instances, but not plants or animals, the latter also includes collective plural nouns), whose assignment is semantically predictable.

Sumerian nouns are organized in two grammatical genders based on animacy: animate and inanimate. Animate nouns include humans, gods, and in some instances the word for "statue". Suffixes mark a noun's case: absolutive (-Ø), ergative (-e), dative/allative (-r(a) animate, -e inanimate, "to, for"), genitive (-(a)k "of"), locative (-a, only inanimate, "in, at"), comitative (-da "with"), equative (-gin "as, like"), directive/adverbial (-š(e) "toward"), ablative (-ta, only inanimate, "from"). The naming and number of cases vary according to differing analyses of Sumerian linguistics. Noun phrases are right branching with adjectives and modifiers following nouns.
 * Gender

The plural markers are /-(e)ne/ (optional) for nouns of the human gender. Non-human nouns are not marked by a plural suffix. However, plurality can also be expressed with the adjective ḫi-a "various", with the plural of the copula /-meš/, by reduplication of the noun (kur-kur "all foreign lands") or of the following adjective (a gal-gal "all the great waters") (reduplication is believed to signify totality) or by the plurality of only the verb form. Plural reference in the verb form occurs only for human nouns. The case markers are /-Ø/ (absolutive), /-e/ (ergative), /-e/ (allative = "to"), /-ak/ (genitive), /-gin/ (equative = "as, like"), /-r(a)/ (dative = "to, for" = indirect object), /-(e)š(e)/ (traditionally called terminative case, but means "towards"), /-da/ (comitative = "together with"), /-a/ (locative = "in, at"), /-ta/ (ablative = "from, by"). Additional spatial or temporal meanings can be expressed by genitive phrases like "at the head of" = "above", "at the face of" = "in front of", "at the outer side of" = "because of" etc.: bar udu ḫad2-ak-a = "outer.side sheep white-genitive-locative" = "in the outer side of a white sheep" = "because of a white sheep".
 * Plurality

The attested independent personal pronouns are written ĝe26-e (1st p. sing.), ze2-e (2nd p. sing.), a-ne or e-ne (3rd p. sing. human), and a/e-ne-ne (3rd p. pl. human). The possessive pronominal morphemes are written -ĝu10 (1st p. sing.), -zu (2nd p. sing.), -(a)-n(i) (3rd p. sing. human), -b(i) (3rd p. sing./pl. non-human, also demonstrative and collective), -me (1st pers. pl.), -zu-ne-ne (2nd p. pl.), and -(a)-ne-ne (3rd pers.pl. animate). For most of the suffixes, vowels are subject to loss if they are attached to vowel-final words.
 * Pronouns

Adjectives
The adjectives and other modifiers follow the noun (lugal maḫ "great king"). The noun itself is not inflected; rather, grammatical markers attach to the noun phrase as a whole, in a certain order. Typically, that order would be noun – adjective – numeral – genitive phrase – relative clause – possessive marker – plural marker – case marker, for example /diĝir gal-gal-ĝu-ne-ra/ ("god great (reduplicated)-my-plural-dative" = "for all my great gods"). The possessive, plural and case markers are traditionally referred to as "suffixes", but have recently also been described as enclitics or postpositions.

The embedded structure of the noun phrase can be illustrated with the phrase sipad udu siki-ak-ak-ene ("the shepherds of woolly sheep"), where the first genitive morpheme (-a(k)) subordinates siki "wool" to udu "sheep", and the second subordinates udu siki-a(k) "sheep of wool" (or "woolly sheep") to sipad "shepherd".

Verbs
Sumerian verbs are marked for three persons: 1st, 2nd, 3rd; in two numbers: singular and plural. Their verbs have a tense-aspect complex, contrasting complete and incomplete actions/states. The two have different conjugations and many have different roots. Verbal roots are mostly monosyllabic, though verbal root duplication and suppletion can also occur to indicate plurality. Root duplication can also indicate iterativity or intensity of the verb. Finite verbs take prefixes and suffixes, non-finite verbs only take suffixes. Non-finite verbs include participles and relative clause verbs, both formed through nominalisation.

The Sumerian verb also makes a binary distinction according to a category that some regard as tense (past vs present-future), others as aspect (perfective vs imperfective), and that will be designated as TA (tense/aspect) in the following. The two members of the opposition entail different conjugation patterns and, at least for many verbs, different stems; they are theory-neutrally referred to with the Akkadian grammatical terms for the two respective forms – ḫamṭu (quick) and marû (slow, fat). Finally, opinions differ on whether the verb has a passive or a middle voice and how it is expressed.

Verbs also mark mood, voice, polarity, iterativity, and intensity; and agree with subjects and objects in number, person, animacy, and case. Sumerian moods are: indicative, imperative, cohortative, precative/affirmative, prospective aspect/cohortative mood, affirmative/negative-volitive, unrealised-volitive?, negative?, affirmative?, polarative, and are marked by a verbal prefix.

The Sumerian finite verb distinguishes a number of moods and agrees (more or less consistently) with the subject and the object in person, number and gender. The verb chain may also incorporate pronominal references to the verb's other modifiers, which has also traditionally been described as "agreement", although, in fact, such a reference and the presence of an actual modifier in the clause need not co-occur: not only e2-še3 ib2-ši-du-un "I'm going to the house", but also e2-še3 i3-du-un "I'm going to the house" and simply ib2-ši-du-un "I'm going to it" are possible.

The verbal root is almost always a monosyllable and, together with various affixes, forms a so-called verbal chain which is described as a sequence of about 15 slots, though the precise models differ. The finite verb has both prefixes and suffixes, while the non-finite verb may only have suffixes. Broadly, the prefixes have been divided in three groups that occur in the following order: modal prefixes, "conjugation prefixes", and pronominal and dimensional prefixes. The suffixes are a future or imperfective marker /-ed-/, pronominal suffixes, and an /-a/ ending that nominalizes the whole verb chain.

Prefixes
The prefixes appear to conflate mood, aspect, and polarity; and their meanings are also affected by the tense-aspect complex. Sumerian voices are: active, and middle or passive. Finite verbs have three classes of prefixes: modal prefixes, conjugational prefixes, and pronominal/dimensional prefixes. Modal prefixes confer the above moods on the verb. Conjugational prefixes are thought to confer perhaps venitive/andative, being/action, focus, valency, or voice distinctions on the verb. Pronominal/dimensional prefixes correspond to noun phrases and their cases.

The modal prefixes are :
 * Modal prefixes
 * /Ø-/ (indicative),
 * /nu-/ and /la-/, /li-/ (negative; /la/ and /li/ are used before the conjugation prefixes ba- and bi2-),
 * /ga-/ (cohortative, "let me/us"),
 * /ḫa-/ or /ḫe-/ with further assimilation of the vowel in later periods (precative or affirmative),
 * /u-/ (prospective "after/when/if", also used as a mild imperative),
 * /na-/ (negative or affirmative),
 * /bara-/ (negative or vetitive),
 * /nuš-/ (unrealizable wish?) and
 * /ša-/ with further assimilation of the vowel in later periods (affirmative?).
 * Their meaning can depend on the TA

The meaning, structure, identity and even the number of "conjugation prefixes" have always been a subject of disagreements. The term "conjugation prefix" simply alludes to the fact that a finite verb in the indicative mood must always contain one of them. Some of their most frequent expressions in writing are mu-, i3- (ED Lagaš variant: e-), ba-, bi2- (ED Lagaš: bi- or be2), im-, im-ma- (ED Lagaš e-ma-), im-mi- (ED Lagaš i3-mi or e-me-), mi-(always followed by pronominal-dimensional -ni-) and al-, and to a lesser extent a-, am3-, am3-ma-, and am3-mi-; virtually all analyses attempt to describe many of the above as combinations or allomorphs of each other. The starting point of most analyses are the obvious facts that the 1st person dative always requires mu-, and that the verb in a "passive" clause without an overt agent tends to have ba-. Proposed explanations usually revolve around the subtleties of spatial grammar, information structure (focus ), verb valency, and, most recently, voice. Mu-, im- and am3- have been described as ventive morphemes, while ba- and bi2- are sometimes analyzed as actually belonging to the pronominal-dimensional group (inanimate pronominal /-b-/ + dative /-a-/ or directive /-i-/). Im-ma-, im-mi-, am3-ma- and am3-mi- are then considered by some as a combination of the ventive and /ba-/, /bi-/ or otherwise a variety of the ventive i3- has been argued to be a mere prothetic vowel, al- a stative prefix, ba- a middle voice prefix, etcetera.
 * Conjugation prefixes

The dimensional prefixes of the verb chain basically correspond to, and often repeat, the case markers of the noun phrase. Like the latter, they are attached to a "head" – a pronominal prefix. The other place where a pronominal prefix can be placed is immediately before the stem, where it can have a different allomorph and expresses the absolutive or the ergative participant (the transitive subject, the intransitive subject or the direct object), depending on the TA and other factors, as explained below. However, this neat system is obscured by the tendency to drop or merge many of the prefixes in writing and possibly in pronunciation as well. -da-, -ta-, -ši- (early -še3-), occurring in this order, are the comitative, ablative and terminative verbal prefixes; the dative (occurring before the others) is probably /-a-/, and a directive /-i-/ (occurring after the others) is widely recognized as well. The pronominal prefixes are /-n-/ and /-b-/ for the 3rd person singular animate and inanimate respectively; the 2nd person singular appears as -e- in most contexts, but as /-r-/ before the dative (-ra-), leading some to assume a phonetic /-ir-/ or /-jr-/. The 1st person may appear as -e-, too, but is more commonly not expressed at all (the same may frequently apply to 3rd and 2nd persons); it is, however, cued by the choice of mu- as conjugation prefix (/mu-/ + /-a-/ → ma-). The 1st, 2nd and 3rd plural infixes are -me-,-re?- and -ne- in the dative and perhaps in other contexts as well, though not in the pre-stem position (see below). An additional exception from the system is the prefix -ni- which corresponds to a noun phrase in the locative – in which case it doesn't seem to be preceded by a pronominal prefix – and, according to Gábor Zólyomi and others, to an animate one in the directive – in the latter case it is analyzed as pronominal /-n-/ + directive /-i-/. Zólyomi and others also believe that special meanings can be expressed by combinations of non-identical noun case and verb prefix. Also according to some researchers /-ni-/ and /bi-/ acquire the forms /-n-/ and /-b-/ (coinciding with the absolutive–ergative pronominal prefixes) before the stem if there isn't already an absolutive–ergative pronominal prefix in pre-stem position: mu-un-kur9 = /mu-ni-kur/ "he went in there" (as opposed to mu-ni-kur9 = mu-ni-in-kur9 = /mu-ni-n-kur/ "he brought in – caused [something or someone] to go in – there".
 * Pronominal and dimensional prefixes

Suffixes
The pronominal suffixes are /-en/ for the first- and second-person singular, /-e/ for the third singular in marû TA and /-Ø/ in ḫamṭu TA, /-enden/ for the first plural, /-enzen/ for the second plural, /-ene/ for the third plural in marû and /-eš/ in ḫamṭu (the initial vowel in all of the above suffixes can be assimilated to the root). The general principle for pronominal agreement in conjugation is that in ḫamṭu TA, the transitive subject is expressed by the prefix, and the direct object by the suffix, and in the marû TA it is the other way round; as for the intransitive subject, it is expressed, in both TAs, by the suffixes and is thus treated like the object in ḫamṭu and like the subject in marû (except that its third person is expressed, not only in ḫamṭu but also in marû, by the suffixes used for the object in the ḫamṭu TA). A major exception from this generalization are the plural forms – in them, not only the prefix (as in the singular), but also the suffix expresses the transitive subject. Additionally, the prefixes of the plural are identical to those of the singular – /-?-/ or /-e-/, /-e-/, /-n-/, /-b-/ – as opposed to the -me-, -re-?, -ne- that are presumed for non-pre-stem position – and some scholars believe that the prefixes of the 1st and second person are /-en-/ rather than /-e-/ when they stand for the object. Before the pronominal suffixes, a suffix /-e(d)-/ with a future or related modal meaning can be inserted, accounting for occurrences of -e in the third-person singular marû of intransitive forms; because of its meaning, it can also be said to signal marû in these forms.
 * Pronominal suffixes and conjugation

Examples for TA and pronominal agreement: (ḫamṭu is rendered with past tense, marû with present): /i-gub-en/ ("I stood" or "I stand"), /i-n-gub-en/ ("he placed me" or "I place him"); /i-sug-enden/ ("we stood/stand"); /i-n-dim-enden/ ("he created us" or "we create him"); /mu-e?-dim-enden/ ("we created [someone or something]"); i3-gub-be2 = /i-gub-ed/ ("he will/must stand"); ib2-gub-be2 = /i-b-gub-e/ ("he places it"); /i-b-dim-ene/ ("they create it"), /i-n-dim-eš/ ("they created [someone or something]" or "he created them"), /i-sug-eš/ ("they stood" or "they stand").

Confusingly, the subject and object prefixes (/-n-/, /-b-/, /-e-/) are not commonly spelled out in early texts, although the "full" spellings do become more usual during the Third Dynasty of Ur (in the Neo-Sumerian period) and especially during the Late Sumerian period. Thus, in earlier texts, one finds mu-ak and i3-ak (e-ak in early dynastic Lagash) instead of mu-un-ak and in-ak for /mu-n-ak/ and /i-n-ak/ "he/she made", and also mu-ak instead of mu-e-ak "you made". Similarly, pre-Ur III texts also spell the first- and second-person suffix /-en/ as -e, making it coincide with the third person in the marû form.