Definition
to be involved in a romantic or intimate relationship with someone
和某人恋爱；与某人发生性关系
She has started to go with that boy recently.
她最近开始和那个男孩交往。
They began to go with each other back in high school.
他们从高中时就开始交往了。
I didn't know she was going with him.
我不知道她和他在一起。