hi, boulai/ and klaggh/ are oxytones. in a sentence, the acute accents will turn into graves, other than in the situations set out in pharr s550.
watch the accents here:
boulai\ kai\ klaggh/.
klaggh\ kai\ boulai/.
it has to do with sound. the highest pitch in each of these sentences is the last syllable. the pitch in these sentences goes up up up &c to the end.
the grave accent warns you that the next syllable (in the next word) will be on a higher pitch. the acute is the opposite, it warns you that the next syllable will drop to a lower pitch.