1.people作为人民来说是集合名词，只有复数含义。2.作为人来说，是单复同型。例如：Who are these people?那些人是谁？3.作为民族来说，是可数名词。例如：The Chinese are a great people.中国人民是伟大的民族。
例句
1、Millions of people have lost their homes.
数百万人流离失所。
2、It's a triumph for the American people.
这是美国人民的胜利。
3、It was peopled by a fiercely independent race of peace-loving Buddhists.
那里住着一个与世隔绝的种族，人们都是爱好和平的佛教徒。
4、Grass's novels are peopled with outlandish characters
格拉斯的小说里都是些稀奇古怪的人物。
5、I don't think people should make promises they don't mean to keep
我认为人们不应作出自己无意信守的承诺。