第三人称单数 meaning in Chinese

it
the third person singular

Last night we talked about our jobs and aslo met some new classmates , so please write a short passage with the leading sentence below : " this is my classmate . . . ， he / she . . . . " in other words , you should give me a brief introduction about your partner
大家好，大家的作业是根据昨天晚上你和你搭档的对话采访来写一篇小短文，内容是有关你的同学的一些简单的情况，包括他的职业，请大家注意第三人称单数的用法，按时完成作业，谢谢！