① 表示特指两个或者两部分中的另一个或另一部分，可直接接单数名词或复数名词。表示两个中的一个……另一个……时，常用。例：

He has two brothers, one is a teacher, is a doctor.

There are forty students in our class, twenty­ one are girls, nineteen are boys.

② 特指某一范围内的其他的(人或物)，是the other的复数形式，相当于the other＋复数名词。the other ＋ 名词复数＝any other ＋ 名词单数。例：

You two stay here, go with me.

③other 作代词或形容词，可修饰可数名词单数或复数。例：

We learn Chinese, maths, English and subjects.

④others作代词，泛指"其他的人或物"。例：

Some students are doing homework, are talking loudly.

⑤another 泛指同类事物中的三者或三者以上的"另一个"，只能代替或修饰单数可数名词。例：

I don't like this one. Please show me one.