如果有比较明确的指定对象，用other系列（分为单数和复数两种情况）；不明确指定对象的时候用else.Other系列的用法：单数情况the other/the other+名词单数/another:There are two boys in the room. One is 20 years old, and the other (boy)is 22.房间里有两个男孩，一个20岁，另一个22岁。

There are three boys in the room. One is 20 years, another is 22, and the third is 24.房间里有三个男孩，一个20岁，一个22岁，另一个24岁。

复数情况：others/other+名词复数/the others:There are 10 boys in the room. Five of them are 20 years old, and the others(或者说the other boys) are 22 years old.房间里有10个男孩，5个20岁，其余的22岁。

There are many boys in the room. Some of them are good at maths, and others (或者说other boys) are good at English.Else的用法：1，和不定代词连用：something else, nothing else, anything else;someone else, no one else,nobody else, anyone else:-Do you want anything else? 你还要些其他什么吗？-No thanks, I want nothing else. 不谢谢，我不要什么了。

-Is there anyone else there? 那里还有其他人吗？-No, there is nobody else. 没有，那里没其他人了。

2。

用在特殊疑问句里：What else do you want to buy? 你还想买些别的什么吗？。