My mother has taught english he has never visted the Great Wall 类似这样的句子中的has是什么成分
问题描述：
My mother has taught english he has never visted the Great Wall 类似这样的句子中的has是什么成分
如题
My mother has taught english he has never visted the Great Wall 、
两句
答
助动词,无义,帮助构成现在完成时