应该是 they were having
例如：They were having supper when I called them.当我打电话给他们的时候,他们正在吃饭.
be doing sth,
were 是 are 的过去时,属于be动词那过去式后some是否要变any呢?谢谢!用some或者用any跟时态没关系 some一般用于肯定any一般用于否定和疑问