怎样区分主句和从句
问题描述：
怎样区分主句和从句
答
主句是句子的主干,而从句是用来修饰主句或者做句子的成分的eg:The boy who is from America is my classmate这里 The boy is my classmate 是主句 who is from America 是定语从句Tell me what happened.what happen...