you
ya
/jə/Reduction
In real speech
What happens to the sounds
Unstressed you loses its long /uː/ and becomes a short /jə/ → “ya”.
When to use it
See ya!, Thank ya, I'll call ya — friendly and casual. Write ya only in texts.
Casual → formal
Slang
ya
Neutral
you
Sound notes
Reduction: unstressed words get squeezed, and their vowels turn into the neutral sound /ə/.