somewhere是副词，可以看成是不定副词。

somewhere：

adv.在某处;到某处；

派生词： somewhere pron.

扩展资料

To my certain knowledge he was somewhere else at the time.

我敢肯定他当时在别处。

Let's go somewhere a little less public.

咱们找一个僻静些的地方吧。

I think we must have taken a wrong turning somewhere.

我觉得我们一定是在什么地方拐错了路。

Somewhere along the line a large amount of money went missing.

有一笔巨款在某一环节上不翼而飞。