Without telling anyone,even her sister,Mary went to the park to meet her friends.

问题描述:

Without telling anyone,even her sister,Mary went to the park to meet her friends.
这是改错题.答案在even前加not .为什么?
从语法角度讲,属于哪方面的错误呢?

前半句“Without telling anyone”是否定的,之后的分句也要否定;
这不属于省略问题;
【补充】
从语法角度讲,属于缺少否定词;