sb是什么的缩写

例句：

1、Has somebody helped himself to some film star's diamonds?

有人偷了某个影星的.钻石了吗?

2、Somebody else lent me a pump and helped me mend the puncture.

别人借给我一个打气筒，又帮我补好了轮胎。

3、If I reduced somebody to tears I'd be mortified.

如果我把谁弄哭了，我会尴尬的。

4、Somebody hired from another country is not likely to resign precipitately.

外国雇员不可能贸然辞职。