fruit表示水果的总称时,属于不可数名词,没有复数.当表示种类的时候,可以加“s”, Is a tomato a fruit or a vegetable? (句中的fruit是可数名词,表示水果的种类) This pudding has two pounds of fresh fruit in it. (这个布丁里有两磅鲜果.句中fruit是不可数名词,表示水果的总称) Do you think raisins are a fruit or a vegetable? They are neither fruit nor vegetables.