怎样用英语表达"如果月底前三天之前得不到客户批准邮件，请告诉我"？ ‎我想知道“月底前三天之前”用英语怎么说？ 比如，怎样用英语表达"如果月底前三天之前得不到客户批准邮件，请告诉我."？ is the below correct? Kindly let me know if no client approval mail is received 3 days before end of month.