where用作从属连词，可引导地点状语从句，相当于in〔at， to〕 the place，其前常有加强语气的词，如just， only， even， right等或否定词not，有时某些成分可以省略。
例句：
It's one of the few countries where people drive on the left.
这是为数不多的`几个靠左行驶的国家之一。
I find it difficult to be objective where he's concerned.
只要涉及他，我就难以做到保持客观。
There comes a point where you give up.
现在你该放弃了。
