when是关系副词还是关系代词

1、关系代词有which, that. who. whom ,whose .

I like the pen which you give me

我喜欢你送我的这只笔。

he is first man that win Nobel Prize.

他是第一个赢得诺贝尔奖的人.

she is the girl who stand in the street.

她是站在街上的那个女孩.

he is the man whom I care for

他是我照顾的那个男人.

I have a car whose the color is green

我有一辆颜色是绿色的车.

2、关系副词有where .when .why

this is the town where I wanted to visit most .

这是我想参观的小镇

I knew her when she wad a little girl.

我认识她的时候，她还是个小姑娘。

please tell me the reason why you did not do your homework.

请告诉我，为什么你不做你的家庭作业