Muller (1983: 49) points out that particles can appear before both verbs in a sequence of verbs; his examples include a case of "aspect change", where the first verb is marked for perfective aspect by preverbal a, while the second is marked by gerundive ta. Maurer (1988: 259ff) describes the same phenomenon, but also includes an example where the first verb is marked by the preverbal nonperfective past marker tabata, the second by gerundive ta.
There are two problems, however, in assessing these cases:
First, they almost always involve complete overlap of the events denoted by the two verbs in sequence.
Secondly, and related to the first issue, the second event is usually a gerundial which marks manner or circumstance. Since gerundials can be used adverbially (Kouwenberg & Murray 1994: 45), this may not, strictly speaking, be an instance of a verb chain. Research is needed to clarify this. Other particles are not attested as participating in this type of construction.
Source: Muller 1983: 49
Source: Muller 1983: 49
Source: Maurer 1988: 261
Source: Maurer 1988: 261