有人...... 某人......

I want to know what they are exactly different in English, Sometime I think they are almost same, and there is no t big difference between 有人 and 某人 in Chinese, same as Taiwan.

“有些人 有的人 某些人”all of them are ok in Chinese. I think there are no big differences between the two words.

有人 某人 有的人 I don't think there is a difference between these two languages on this.

有的人 某些人