"other" 和 "another" 都表示 "另一个" 的意思，但两者之间有一些细微有什么区别。
"Other" 是用来指代两个或两个以上的事物中的第二个或后续的事物，表示除去已经提到的一个或若干个事物以外的其他事物，常用于复数形式。比如：I have three pens, can you give me the other one?
"Another" 则是用来指代与前面单独的一个事物一样的另外一个事物，表示 "再一个" 或 "另一个"，常用于单数形式。比如：I have a pen, can you give me another one?
因此，"other" 强调的是除去已经提到的事物以外的其他事物，而 "another" 强调的是与前面提到的事物一样的另一个事物。
other和another有什么区别
1. 不定代词other等于名词或形容词,可以在句中作主语、宾语、定语等。等于名词时,有复数形式others。
作主语：He has two toys. One is for me, the other is for himself.
作宾语：I have two pictures. You have seen one. Now I will show you the other.
作定语：There are other ways of helping him out of difficulty.
2. 不定代词another是由an和other构成，由此可以断定它只能代替或修饰可数的单数名词，前面不再用冠词。可以在句中作主语、宾语、表语和定语。
作主语：One wanted to read, and another wanted to watch TV.
作宾语：Please give me another.
作表语：She is a fool, and her sister is another.
作定语：Would you like another cup of coffee?
3. 对比other与another
the other 用于两者中的另一个，another 指三者以上中的另一个：
He has two toys. One is for me, the other is for himself.
All these are not good. Show me another, please.
another 还有 “再……” 的意思，other 有 “另外” 的意思：
Have another cup of coffee, please. 再喝一杯咖啡吧!
The girl is much cleverer than other three. 这女生比另外三个都聪明。
修饰数词的结构不同：数词+other+复数名词= another+数词+复数名词：
这周我多看了两本书。
I read two more books this week. =I read two more books this week.
one another 与 each other：两者均表示“彼此”、“互相”。
一般觉得，each other 用于两者间，one another 用于三者或以上，但在现代英语中，两者常可换用。
We should always help each other.
They don’t agree with one another.
另外，童鞋们还应该注意，注意：other表泛指，the other 表特指，与其复数others和the others 同理。
