半年前是哪个月，用英语可以表达为 “six months ago”。具体是哪个月，这取决于你从哪个月开始计算。例如，如果你从今年的一月算起，那么半年前就是去年的七月。以下是一些常见的表达方式：
- If you start counting from January, six months ago would be July: “Six months ago was July.”
- If you start counting from February, six months ago would be August: “Six months ago was August.”
- If you start counting from March, six months ago would be September: “Six months ago was September.”
- And so on…
要准确回答这个问题，你需要知道具体的起始月份。