Pitch and tense

tonight i was talking to a friend who speaks in a raised pitch whenever
talking about something that happened to her, and i got the idea that this
would work well with Nzva, which sounds very monotone.  the present tense,
when said in a high pitch (i am using the term without being sure that it's
appropriate), is the narrative past tense.  normal past tense is formed by
the past tense of the modal auxiliary pan ("to do" i suppose would be the bst
translation of that):

MOD. Modal verb (governs the meaning of verb endings)
PRO. Progressive
PST. Past

ey dey  ro  aus-ayd        kim-el
he MOD. the store-towards  move-PRO.
he is going to the store (present-progressive)

ey-d'z     ro  aus-ayd  kimel
he-MOD.PST the store-to move.PRO
he was going to the store

EY DEY  RO  AUS-AYD        KIM-EL [in higher pitch]
he MOD. the store-towards  move-PRO.
he was going to the store (I saw/heard about it/I am quoting what someone
said)

I am still not sure how to write the high pitch, or whether the whole
sentence or just the verb should be in a high pitch, but for now the idea
stands. any comments?

pacs precs
Joe Mondello