I'm       
uk/aɪm/ us/aɪm/
 (I am的缩略形式)
short form of I am
  I'm so happy for you! 我真替你高兴! 
 - More examples
 - I'm hungry. What's for dinner?
 - I'm determined to get a better job.
 - When I'm older, I'm going to be a famous artist.
 - I get terribly nervous when I'm speaking in public.
 - I've told Steve I'm not interested, but he keeps asking me out.