yi- With the negating words "gesdi", "tsa" (E), or "tla" (W), this prefix must be used to express a negative statement. When used alone it expresses the conditional "if", "can", or "could". ᏯᏗᏔᏍᎦ yaditasga - if he drinks...
g - The pronoun "I", this is an "A" Class bound pronoun, used before a vowel.
-aditasg- - present verb stem for "drink"
-o'i - habitual tense suffix. In conversation the "i" is often dropped, thus "ᎧᏫ ᎦᏗᏔᏍᎪ kawi gaditasgo" I (usually) drink coffee.