Like all Algonquian languages, the grammar of Miami–Illinois is highly
agglutinative, with particularly complex inflection on the verb. Other characteristically Algonquian features are a distinction between
animate and inanimate gender on both nouns and verbs and a syntactic category of
obviation. First-person forms distinguish
clusivity (whether or not the addressee "you" is included in "we").
Nouns Miami–Illinois noun inflection distinguishes two genders (animate vs. inanimate), two numbers (singular vs. plural), and four cases (proximate, obviative,
locative, and
vocative). Gender is marked only in the proximate case. The endings of the noun, with common allomorphs, are detailed in the table below.
Proximate case and gender The proximate case is the basic
citation form of the noun. It is used to mark either the agent or patient of a verb in sentences with only one expressed noun phrase. Its singular forms regularly end in
-a for animate nouns and
-i for inanimate nouns. This transparent representation of gender on the noun sets Miami–Illinois apart from many other Algonquian languages, where deletion of word-final vowels has obscured gender marking. Gender is usually predictable from nature, but some nouns that would be expected to be inanimate are in fact marked as animate: 'hail', 'bead'. Many of these unexpectedly animate nouns have a special significance in traditional Miami–Illinois culture, and the gender assignment for some can be traced back to Proto-Algonquian. A handful of nouns can take either animate or inanimate gender. Categories with unpredictable internal gender assignments include body parts ( 'your cheek' but 'your nose') and names for plants. The regular animate proximate plural suffix is . Some nouns ending in in the singular end in (deleting the final ) in the plural, along with or to the exclusion of regular : 'bear' becomes 'bears', but 'ant' can become either or . A handful of nouns, including all nouns ending in 'berry', pluralise with : 'nets', 'gooseberries'. The inanimate proximate plural suffix is
-a, homophonous with the animate singular; since plural form takes the same gender as its corresponding singular, the number of a gender-ambivalent noun can occasionally be ambiguous. Some inanimate nouns with a
-k- in the final syllable are suffixed with
-ia instead: becomes 'sleds'. Historically, the latter descends from verb
participles rather than original nouns.
Obviative The obviative singular ends in . , or ; the obviative plural ends in , , or . The allomorphy here is determined in the same way as the proximate plural; if a noun takes or , it will take the corresponding forms with
-oo- or
-ii- in the obviative forms. The obviative case is used for the
less salient of two nominal arguments in a sentence, which is not necessarily either the subject or object. Explicit
role markers are affixed to the verb instead, matching the subject of the verb with the proximate or obviative noun as necessary. Since most sentences only have a single nominal argument - always a proximate - the obviative is a marked case, unlike the
absolutive. As in all Algonquian languages, the choice of which arguments to mark as proximate and which to mark as obviative is determined by complex discourse considerations.
Locative and vocative cases The locative case marks a noun as characterizing the place at, on, or in which an action occurs. The precise type of position, which is disambiguated by different
prepositions in English, is in Miami–Illinois simply assumed from context: 'at the door', 'on the hill', 'in the bucket'. Locative marking is mutually exclusive with gender and number marking, so the gender and number of a locative noun can also only be understood by context: can mean both 'in the house' and 'in the houses'. The regular form of the locative suffix is , with the following common allomorphs: when the suffix falls on a weak vowel (as in 'house'), for stems ending in , and for most stems ending in . Both of the latter two allomorphs delete a final . These rules do not predict all locative case forms, however. Nouns, particles, and intransitive animate verbs can all take the locative. The last is a common way of forming place names: 'it is straight' ~ 'the place where it (the river) is straight;
Peru, Indiana'. The locative case can be extended with the
ablative suffix , 'from', and the
allative , 'to, towards'. In locatives derived from full nouns and intransitive animate verbs, these suffixes must follow the locative suffix (e.g. 'from town'), but most particles can take them without the locative ( 'from over there'). The vocative case indicates the person or thing being addressed. It is formed regularly with the suffix in the singular and in the plural.
Diminutive There are several different patterns that form
diminutive nouns in Miami–Illinois. Costa describes the formation of diminutives as "extremely complex - much more irregular than that seen in its closest Algonquian relatives". The most common diminutive suffix is , which is followed by the case ending.
Possession Personal possession is marked by prefixation. Nouns are either "dependent" or "nondependent", usually based on whether they are
inalienably possessed or not. Dependent nouns
must co-occur with a possessive prefix or with an indefinite possessor suffix, but require no possessee suffix, while non-dependent nouns can occur without a possessive prefix but often must take the possessee suffix - when possessed. The primary allomorphs of the first, second, and third possessive prefixes are , , and respectively. The number of the possessor (as well as
clusivity of the first person) is marked by a suffix. A representative, but by no means comprehensive, paradigm is illustrated below with the inanimate stem 'house'.
Pronouns Since Miami–Illinois is a robustly
pro-drop language, independent personal pronouns are used far less frequently than in English. Pronouns do not distinguish gender or case; instead, there are distinct forms to isolate a topic (e.g. "by myself") and to make a verb
reflexive. The personal pronouns are listed below. The other pronouns are 'who', 'what', 'somebody', and 'nobody'. All conjugate for number and obviation: and take suffixes, while and are regular. == Notes ==