his wife continued asking questions,when she suddenly niticed a big hole in her husband's hat.这句是什么句子结构》?为什么用逗号隔开.
问题描述：
his wife continued asking questions,when she suddenly niticed a big hole in her husband's hat.这句是什么句子结构》?为什么用逗号隔开.
答
就是一个状语从句,逗号加不加无所谓