关系副词：有四个，分别是“when”“where”“why”“how”。

I was born in nanjin，in which I met merr.

I was born in nanjing，where I met merry.

我出生在南京，我见到了麦芮。

I went to the station，at which I met John.

I went to the station，where I met John.

我去了车站，我见到了约翰。

I climb to the top hill met peitt

我爬到了山丘的山顶见到了皮特。

I was born on October 17st 1948 which it was raining.

我出生在1948年10月17日，那天正在下雨。