haven't       
uk/ˈhæv.ənt/ us/ˈhæv.ənt/
 还没有
short form of have not
  I haven't been to Australia. 我没去过澳大利亚。 
 - More examples
 - I haven't played tennis for years.
 - "I've never been to the States." "I haven't either."
 - You haven't answered my question.
 - Of course the radio isn't working - you haven't plugged it in!
 - Haven't you finished yet? Come on, we've really got to go.