These so-called friends are a bad influnce on her.
问题描述：
These so-called friends are a bad influnce on her.
are 怎么和a连用呢?
没太听明白，
答
本句主语：These so-called friends ---那些所谓的朋友,所以本句的谓语动词要用复数形式are,相信这你能理解.同时,存在这样一短语：be a good/bad influence on sb 对某人有好/坏的影响.那么结合此句的主语,这里的be...