The standard negator precedes the verbal complex, including preverbal tense-aspect markers. Note though that the left-peripheral position of Mood marker lo means that lo precedes the negator. It is worth noting that the standard negator also precedes copula ta or the past form tabata/tawata.
Source: Muller 1989: 90
Source: nd: 25 June 2009, p.3
Source: nd: 25 June 2009, p.3
Source: nd: 14 July 2009, p.4