difference什麼時候用複數

想說明“不一樣”這個特點，就用單數，因為是不可數

想說明“不相同的地方，不同點”這些可以數出來的就可以使用複數了.

There are many differences between the two languages，There is a difference between the two there some differences between the students?

很多因為單詞都有相似的用法

一、當difference 表示"差異，差別"是可數名詞:

There are many differences between living in a city and living in the country.生活在城市和生活在鄉村有許多不同之處.

二、當difference 表示"差額，差數"是不可數名詞:

The difference between 5 and 11 is 6.十一和五的差是六.

Flowers make no/a lot of difference to a room. 一個房間裡有沒有鮮花沒有/有很大差別.

三、當difference 表示"不和，分歧"是可數名詞:

They've settled their differences and are friends again.他們已消除芥蒂，重歸於好.

make a difference，因為這裡的difference 表示"差額，差數"，是不可數名詞，所以用a。