In Vietnamese, syllables can
have six different tones, with five of them indicated by tone marks applied
to the syllable's main vowel. Tone marks can be combined with the other
diacritics.
a
flat
á
high rising; example: đấy, like saying "day?"
à
low
ã
creaky
ả
falling, then rising
ạ
a low "a'ah"
