weak form
content words and function words
funtion words 有weak form 和 strong form
you
have
from
https://www.englishforums.com/English/PronunciationOfTo/dbqnl/post.htm
https://www.multimedia-english.com/phonetics/weak-vs-strong-forms
https://www.youtube.com/watch?v=UbcEiFTmkQo&feature=youtu.be