their的主格是they。their作为限定词，中文含义有“他们的”、“她们的”、“它们的”，可以在提及性别不详的人时，用以代替his或her；they作为代词，意思有“他们”、“她们”、“它们”、“人们”等。
一、their的中文含义及双语例句
their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。例句有：
1、Their parties are always fun.
他们的聚会总是乐趣横生。
2、If anyone calls, ask for their number so I can call them back.
如有人打电话来，问问电话号码，这样我可以回电话。
3、They both had some right on their side.
他们双方都有一定的道理。
4、They worked hard to give their children a good start in life.
他们力争为孩子们奠定一个良好的基础。
5、People often share their political views with their parents.
人常常跟自己的父母政治观点一致。
6、Fewer people write with their left hand than with their right.
用左手写字的人比用右手的人少。
二、they的中文含义及双语例句
they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。例句有：
1、If anyone arrives late they'll have to wait outside.
谁要是迟到，他就得在外面等着。
2、The rest, as they say, is history.
其余的就尽人皆知，不须赘述了。
3、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。
4、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。
