The conditional clause

Koa has had a word meaning "if," ha -- borrowed from Hungarian, incidentally -- since late 2010. Until recently, though, there hadn't been so much as an attempt to feel out syntax with this particle, or the syntax or semantics of conditional clauses in general: I'm not sure how this is possible, but I may have managed never even to have tried to speak or write a conditional clause in this language. With the recent formalization of clause type marking, we can finally answer some extremely long-standing questions! This post attempts to bring conditional structures up to date with the rest of Koa's development.

Before diving into whole clauses, I should mention that ha can also have the scope of a single predicate, in which case it has the sense of "would-be," "theoretical," "supposed," or rather perfectly, Polish niby. This type of usage was in fact the only example I gave in ha's initial unveiling (respelled with modern conventions):

ka ha-lóha-ni
DEF COND-love-1SG
"my would-be lover," "mój niby kochanek"

There's also a ke-compound, keha, meaning "conditional" or "hypothetical": thus vike keha "conditional clause."

Conditional structures in Koa have a protasis set off by ha "if," and an apodosis optionally introduced by translative io (roughly "already"), the presentative vo, or the heavier-handed laa "consequently," any of these the Koa equivalent of "then." The particular sequence of TAM markers in each half of the construction yields some lovely complexity, which has had the additional benefit of helping to heal the wounds of Ancient Greek studies in college...I had never expected to make friends with the words "future more vivid" again!

There are two broad categories of conditional clauses, each with a set of subtypes. The first category describes situations/conditions that are really and demonstrably true, and is characterized by a protasis and apodosis both in the realis mode. The second category describes situations/conditions that are hypothetical, contrafactual, idealized, or otherwise imaginary; these are characterized by the irrealis mode in the apodosis, and usually the protasis as well.

Table 1: Real Situations

Type	Example	Protasis	Apodosis
General nonpast	If X is true, then Y is true	simple	simple; imperative
Habitual nonpast	Whenever X happens, Y happens	simple (habitual)	simple habitual
Deductive nonpast	If X is true now, that means Y was true then	simple	anterior (presumptive)
General perfect	If X has happened, then Y happens	anterior	simple
General past	If X was true, then Y was true	anterior	anterior
Habitual past	Whenever X happened, Y happened	anterior (habitual)	anterior habitual

Table 2: Imaginary Situations

Type	Example	Protasis	Apodosis
Ideal nonpast	If X happens, then Y will happen; If X were to happen, then Y would happen	simple	irrealis; imperative
Ideal perfect	If X were to have happened, then Y would happen now	anterior	irrealis
Ideal past	If X were to have happened, then Y would have happened	anterior	irrealis anterior
Unreal nonpast	If X were true now, then Y would be true now	irrealis	irrealis
Unreal perfect	If X had happened, then Y would happen now	irrealis anterior	irrealis
Unreal past	If X had happened, then Y would have happened	irrealis anterior	irrealis anterior

Notes:

1. In Habitual clauses, habitual marking in the protasis is optional.
2. Other TAM information may be added to the protasis and/or apodosis (ma [imperfect], for instance) without affecting the conditional semantics.
3. The distinction between Ideal and Unreal is somewhat idealized (no pun intended). Irrealis marking is the default for both protasis and apodosis in imaginary situations, especially in speech (other than the "vivid future," see below).
4. The Ideal Nonpast corresponds both to what Ancient Greek would consider a more vivid future ("If the babysitter is free, then we will go see the concert") and a less vivid future ("If the baby sitter were to be free, we would go to the concert"). The Koa sense of things is that all futurity is hypothetical and thus does not make this distinction; but if the apodosis describes intention or will, the volitive lu rather than irrealis cu can be employed to approach some of that sense ("If the babysitter is free, we mean to go to the concert").

Now for the fun part: examples. There are a lot of possible uses for each of these types, so this will be just an overview to give a general sense.

Examples - Real Situations

hu anu ha ne ka ipu [simple], ka ipu vo na-moha [simple]
EXIST water COND.CL LOC DEF cup DEF cup PRES.CL NEG-empty
"if there is water in the cup, then the cup is not empty"
(General Nonpast)

ha ni-ca-nuku he-tula iva [simple], vénea-ni [imperative]
COND.CL 1SG-cont-sleep TEMP-hour nine wake-HON-1SG
"if I'm still asleep at 9 o'clock, please wake me up"
(General Nonpast)

ha me-vua [simple], ka toto i io-va-mi-hulu [habitual]
COND COM-rain DEF child VB.CL TRANS-HAB-INCH-crazy
"if/whenever it rains, the kids go crazy"
(Habitual Nonpast)

ka ovi ha hemo [simple], laa se-li-si-tule la.koto me ka áva.le [anterior presumptive]

DEF door COND.CL unlocked therefore 2SG-PRSM-ANT-come home COM DEF key
"if the door is unlocked, then you must have brought the keys home"
(Deductive Nonpast)

le_Kéoni ha si-náe-nu mo-like [anterior], vo nu-me-háka.te [simple]
John COND.CL ANT-see-1PL SIM-together PRES.CL 1PL-COM-trouble
"if John saw/has seen us together, we're in trouble"
(General Perfect)

ha ni-si-kánu-se [anterior], ve na-ilo sa ni-si-ete [anterior]

COND.CL 1SG-ANT-harm-2SG ADV.CL NEG-know FOC 1SG-ANT-do

"if I hurt you, I did so unwittingly"
(General Past)

ha si-va-me-sua ne-lani kica [anterior habitual], ni-simo i si-va-mi-tumu pe-pa.mana [anterior habitual]
COND ANT-HAB-COM-sun LOC-sky clear 1SG-heart VB.CL ANT-HAB-INCH-full BEN-intention
"if/whenever the sun was shining in a clear sky, my heart would fill up with plans"
(Habitual Past)

Examples - Imaginary Situations

le_Lóliki ha kii po kunu [simple], ta-io-cu-opi aha pe-imi [irrealis]
Olga COND.CL get UNIV dog 3SG-TRANS-IRR-learn something BEN-self
"If Olga got a dog (and she might), she would learn some things about herself"
(Ideal Nonpast - her idea!)

ha tu-si-mene i tesu [anterior], vo tu-cu-sano po pa.opo mu.kiki he.lila.tana [irrealis]
COND.CL 3PL.ANT.GO VB.CL travel PRES.CL 3PL-IRR-say UNIV story funny tonight
"If they were to have gone on a trip (and they might have), they would tell some funny stories tonight"
(Ideal Perfect)

ha nu-si-ne le_Pékeli he.sama [anterior], nu-cu-si-te-hi-nae ve.na-huo! [irrealis anterior]
COND.CL 1PL-ANT-LOC Berkeley at.the.same.time 1PL-IRR-ANT-ABIL-REFL-see without.noticing
"If we were to have been in Berkeley at the same time (and we might have been), we could have seen each other without realizing it!"
(Ideal Past)

ka piha i cu-via taa [irrealis] ha cu-me-vua [irrealis]
DEF yard VB.CL IRR-content surpass CON.CL IRR-COM-rain
"The yard would be happier if it were raining (but it's not)"
(Unreal Nonpast - protasis and apodosis reversed)

ka ámo.e ha na-cu-si-láhe-ni [irrealis anterior], ni-na-cu-éki-ne ve.ona ne-sáki.lo he.ti.tia [irrealis]
DEF wife COND.CL NEG-IRR-ANT-leave-1SG 1SG-NEG-IRR-sit-LOC drunk LOC-bar right.now
"If my wife hadn't left me (but she did), I wouldn't be sitting here drunk in a bar right now (but I am)"
(Unreal Perfect)

ha cu-si-me-vitu [irrealis anterior], ka nui i io-cu-si-mu.kino poli_i_taa [irrealis anterior]
COND.CL IRR-ANT-COM-dragon DEF world VB.CL TRANS-IRR-ANT-interesting much.more
"if dragons had existed (but they didn't), the world would have been much more interesting (but it wasn't)"
(Unreal Past)

One comment: as table note 4 above mentions, the Ideal clause types -- though valid -- are less likely to be used in flowing speech: I think they would be more formal or literary if used. The corresponding Unreal types are more natural Koa for both meanings; this causes a small amount of ambiguity in the interpretation of such clauses, but this would be resolved in context:

le_Lóliki ha cu-kii po kunu [irrealis], ta-io-cu-opi aha pe-imi [irrealis]

Olga COND.CL get UNIV dog 3SG-TRANS-IRR-learn something BEN-self

"If Olga got a dog (and she might), she would learn some things about herself" OR
"If Olga were getting a dog (but she's not), she would learn some things about herself"

Whew. It took me a day to write up the grammatical description and several weeks to write the examples...it's clear which is the preferred activity! But I'm happy with the range of meaning these sentences were able to showcase.