Editing Koasati language (section)

====Position classes====
Kimball identifies the following position classes for prefixes and suffixes that can be added to Koasati verb roots:
*Prefixes
**'''Position 1''': positive and negative subject prefixes
**'''Position 2''': locative prefix ''a-'', or the prefix ''ak-'' which indicates action on the surface of a person (skin) or thing
**'''Position 3''': locative prefixes
**'''Position 4''': pronominal prefixes (''ca-'')
**'''Position 5''': pronominal prefixes (''am-'')
**'''Position 6''': distributive prefix ''ho-/oh-'', iterative prefix ''hoho-/ohoh-''
**'''Position 7''': instrumental prefixes
**'''Position 8''': directional prefixes
**'''Position 9''': indefinite nouns ''na꞉si-/na꞉s-/nas-'' ('something') and ''a꞉ti-/a꞉t-/at-/a-'' ('someone')
*Root
*Suffixes
**'''Position 1''': adverb
**'''Position 2''': diminutive/intensive
**'''Position 3''': habitual
**'''Position 4''': intention
**'''Position 5''': ability
**'''Position 6''': realis/irrealis
**'''Position 7''': deduction
**'''Position 8''': modality
**'''Position 9''': dubiative
**'''Position 10''': hearsay
**'''Position 11''': auditory
**'''Position 12''': tense
**'''Position 13''': consequence
**'''Position 14''': discourse functions
**'''Position 15''': enclitics

=====Prefixes=====
Unlike its frequently used cognates in other Muskogean languages, the general locative prefix ''a''- (Position 2) is falling out of use. Positions 4 and 5 relate to the ''am''- and ''ca''- sets discussed above with nouns. They contain the direct and indirect object prefixes respectively and are used to cross-reference the direct and indirect objects of verbs, as well as mark possession on nominalized verbs. For example, the Position 5 prefix ''ac''- is used to mark possession on the root of the nominalized verb meaning "to photograph" in the following way:

{{interlinear|indent=3
|top= /stacahó꞉ba/
|st- ac- ahó꞉ba
|INSTR- 1SG.POSS- photograph
|"my photograph" ("a photograph of me")}}

A sampling of verbal prefixes, in this case, specific locative prefixes of Position 3, follows:
*''itta''- "action on the ground; action in fire"
*''o꞉''-/''o꞉w''- "action in water"
*''pa꞉''- "action on a raised, artificial, or non-ground surface"
*''on''- "action on a vertical surface or in a vertical plane"
*''itta''- "action in the middle of something"
*''ibi꞉''- "action on the human face"
*''ico꞉''- "action on or in the human mouth"
*''no꞉''- "action on the human neck"
*''nok''- "action in the human throat"

=====Suffixes=====
Kimball recorded over seventy suffixes to fill the fifteen suffix positions. All but eleven of these suffixes can technically co-occur with all other suffixes that do not occupy the same position class. Kimball provides the following example as a possibility:

{{interlinear|indent=3
|top= /ostohimilá꞉cihalpí꞉salaho꞉limá꞉mimpayon incayínkǫ/
|o-st-oh-im-ilá-꞉ci-halpí꞉sa-laho-꞉li-má꞉mi-mpa-y-on im-ca-yím-ko-˛
|go:&-INSTR-DISTR-3.DAT-arrive-PL-{{gcl|ABIL|ability}}-IRR-DEDUC-HSY-CNSQ-SW:FOC 3.STAT.OBJ-1SG.STAT-believe-3.NEG(1A)-PHR:TERM
|"They say that they all might be able to go and bring it to him, but on the contrary, I do not believe them."}}

In the first word, all units that follow the root -''ilá''- "arrive" are suffixes filling the various position classes.

A sample of suffixes, in this case, Position 5 suffixes of ability, follows:
*-''bá꞉no''- "regularly, occasionally"
*-''bí꞉no''- "reluctantly, shyly"
*-''halpi꞉sa''- "to be able to"
*-''yáhli''- "be obliged to, really"

Kimball notes that of these, only -''halpi꞉sa''- "to be able to" is used frequently.