aren't          
uk/ɑːnt/ us/ɑːrnt/
 (are not的缩略形式)
short form of are not
  The boys aren't going to the party. 男孩子们都不去参加聚会。 
  (用于疑问句中)
am not, used in questions
  I'm late again, aren't I? 我又迟到了,是吧? 
 
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