逗号隔开的定语从句,一般视为非限定性定语从句。先行词作状语,这是由后面从句决定的,因为从句中不缺少主语,宾语,所以只能作状语。如:This is the city which I visited last summer .(从句缺少宾语,选择关系代词。)This is the city where they were born .(从句不缺少主语,不用宾语;所以选择关系副词)答题不易,满意请采纳!谢谢!有问题欢迎追问!
首先这是限定性定语从句