114 ROBERT D. VAN VALIN, JR.(107b) is therefore an example of cosubordination. In core junctures, illus
trated in (108), the relevant operator is modality; all clause-level operators
are shared by definition. In (108a) the modality operator -meli "should,
ought to" modifies both clauses in the construction, indicating that the
nexus relation is cosubordination. In (108b), by contrast, the modality
operator -ebil "ability", has scope only over the core in which it is located.
Hence this is a case of coordination at the core level. Finally, the two Barai
sentences in (109) exemplify nuclear junctures (Olson 1981); in (a) the pro
gressive aspect marker is the verb va "continue", and it modifies both
"call" and fie "listen," while in (b) the perfective aspect marker, the verb
furi "finish," modifies only ufu "cut" and not numu "pile" and akoe "throw
away." This use of verbs in a serial construction as aspectual operators is an
example of nuclear subordination, a juncture-nexus type that was errone
ously claimed to be impossible in FVV and Van Valin (1984). However, in