4.2.3.4 Distinctions in the shape of subject and object markers Subject
and object markers sharing the same semantic features may have identical
phonological forms. However, in a number of African languages, even among
those that have no case distinction between subjects and objects, subject
markers differ from the corresponding object markers, at least in some persons.
For example, in Tswana (as in many other Bantu languages), subject markers
and object markers have distinct segmental forms in the first person singular, in
the second person singular, and in noun class 1; in the first and second person
plural, and in the classes other than class 1, they have the same segmental form,
but their tonal properties are always very different .
In African languages, differences in the phonological shape of pronominal
markers sharing the same semantic features almost always have a straight-
forward explanation in terms of the traditionally recognized syntactic func-
tions subject and object.
Anywa and other Western Nilotic languages with ergative properties appear
to be an exception to this general rule. As shown by Reh (1996), Anywa has
two sets of pronominal markers attached to verbs, but there is no one-to-one
correspondence between these two sets and the syntactic functions subject and
object, and Reh analyzes the correspondence as a case of split ergativity: in
certain constructions, indexation follows an ergative pattern, with prefixes
used to represent A, and suffixes used to represent S or O, whereas in other
constructions, the same suffixes are used to represent S or A, resulting in an
accusative pattern. The same holds for Pa
¨
ri. Some Kordofanian languages
have fused S and O verbal prefixes, e.g., Orig Musa adi- fagna (Musa 3SG.1.
SG-beat) ‘Musa beat me’ (Schadeberg & Elias 1979).
The active pattern (in which intransitive verbs divide into two classes, the
intransitive subject markers being identical with the subject markers of tran-
sitive verbs in one class, and with the object markers in the other) and the
direct/inverse pattern (in which a given combination of persons in transitive
verb morphology is encoded without taking into account the respective roles of
the arguments referred to) are also very rare in Africa; it has however been
proposed to recognize an indexation system of the direct/inverse type in
Maasai (Payne et al. 1994), and indexation systems showing features that can
be analyzed as pointing to an active pattern have been signaled in the Saharan
languages Berti and Beria, in the Mande language Loma, and in some Berber
languages (Ko
¨
nig 2004a).
4.2.4 Special treatment of indefinite or non-referential objects
Several African languages treat indefinite or non-referential objects differently
from definite or referential ones. The distinction may concern case marking (in
Haro, only definite objects take the accusative suffix; see Woldemariam 2004)
Denis Creissels et al.96