求高手分析以下这个英语句子.Boy friends are completely different from best
求高手分析以下这个英语句子.
Boy friends are completely different from best friends; the distinction being that boyfriends come and go , while girl friends often stay in your life throughout high school ,and even afterwards.
不是说分号两边是两个完整的句子吗?为啥后面那个句子貌似不像句子啊,用了being