/hi: ||; hi/pronoun (the subject of a verb) the male person mentioned earlier （作动词的主语）他（指上文提及的男子）: I spoke to John before he left. 我跟约翰说了话他才离开。Look at that little boy -- he's going to fall in! 瞧那小男孩，他快掉进去了！ If you want to refer to a person who could be either male or female, there are several ways to do this: He or she, him or her, and in writing he/she or s/he can be used If you are not sure, ask your doctor. He/she can give you further information. In informal language you can use they, them or their Everybody knows what they want. When somebody asks me a question I always try to give them a quick answer. Or the sentence can be made plural A baby cries when s/he is tired becomes Babies cry when they are tired. 要是所指的人不知道是男是女，可以用几种办法：可以用he or she、him or her，在书面语里可用he/she或s/he：If you are not sure, ask your doctor. He/she can give you further information.要是拿不准，问问医生。他╱她会向你提供有关详情。在非正式场合里，可以用they、them或their：Everybody knows what they want. 人人都知道他╱她想要什么。·When somebody asks me question I always try to give them a quick answer.有人提问题，我总是尽快回答他╱她。把句子改成复数形式也可以：A baby cries when s/he is tired可改成Babies cry when they are tired.婴儿累了就会哭。