Datapoint Sango/Tightness of the link between the progressive marker and the verb

Value 6: For the use of the copula as a progressive marker see Feature 47 "Uses of the progressive marker". Nothing can occur between the copula and the following verb, not even the predicate marker.

Values

Particle, nothing can intervene

Example 59-147:
lo tene mama ti lo ake kiri lawa
lo
3sg
tene
say
mama
mother
ti
of
lo
3sg
a-ke
pm-cop
kiri
return
lawa
when
He asked when her mother was returning.