they的宾格和物主代词分别为them和their。they作为代词，含义为“他/她/它们”、“泛指人们”、“权威人士”，用以代替he或she，指性别不详的人；them作为they的宾格形式，指性别不详的人时，用以代替him或her；their作为they的物主代词，含义为“他们的”，指在提及性别不详的人时，用以代替his或her。

they作为代词，意为他们;她们;它们;用以代替he或she，指性别不详的人;(泛指)人们，人人，众人;权威人士。

例句：If anyone arrives late they'll have to wait outside.

谁要是迟到，他就得在外面等着。

The rest, as they say, is history.

其余的就尽人皆知，不须赘述了。

They now say that red wine is good for you.

现在专家说喝红葡萄酒对人有好处。

The two men were far more alike than they would ever admit...

那两个人也许不承认，可他们非常相像。

They say there's plenty of opportunities out there, you just have to look carefully and you'll find them...

他们说，那里机会多的是，你只要仔细找就能发现。

The situation was more complicated than they had at first realized.

形势比他们最初意识到的更为复杂。

We couldn't understand them because they were talking in Chinese.

我们听不懂他们在讲些什么，因为他们说的是汉语。

If they entered the building they would be breaking the law.

如果进入那栋大楼，他们就会触犯法律。

them作为宾语，意为他们;她们;它们;指性别不详的人时，用以代替him或her。

例句：What are you doing with those matches? Give them to me.

你拿那些火柴做什么？把它们交给我。

If anyone comes in before I get back, ask them to wait.

如果在我回来之前有人来，就请他等一等。

The Beatles — I never get tired of listening to them...

甲壳虫乐队——我是百听不厌。

It takes great courage to face your child and tell them the truth.

面对自己的孩子，告诉他们真相是需要很大勇气的。

'Our Billy doesn't eat them ones,' Helen said.

“咱家比利不吃那些东西，”海伦说。

their作为物主代词，意为他们的;她们的;它们的;在提及性别不详的人时，用以代替his或her。

例句：Their success is due in large part to their determination.

他们的成功在很大程度上应归功于他们的决心。

Make sure you get a good look at their faces.

你一定要仔细看清他们的面孔。

No one in their right mind would choose to work there.

任何一个精神正常的人都不会选择去那里工作。

Many people don't use their computers to their full potential.

很多人没有充分利用他们计算机的全部潜在功能。

Students should aim to become more independent of their teachers.

学生应该努力逐渐减少对老师的依赖。

Most people said that pay was their main motivation for working.

大多数人说赚取报酬是他们工作的主要动机。

None of this would have been possible without their help.

如果没有他们的协助，这事没有一样能办成。

We encourage all students to work at their own pace.

我们鼓励学生都按自己的节奏学习。