them(他她它们)是they的宾格，一般在介词后；

they(他它她) 是代词，作主语。放在句子开头，能够引起整个句子。

相关介绍

I can probably make the time to see them.

我大概能腾出时间去看望他们。

Many local people believe the development will profit them.

当地的许多人认为，这项开发将对他们有利。

They decided to base the new company in York.

他们决定将新成立的公司总部设在约克郡。

They won by a single goal after extra time.

他们在加时赛中仅踢进一球即获胜。