英语fruit和vegetable的复数情况Try to have more fruit and vegetables because they are rich in vitamins,high in nutrition yet low in calories这句话我给老外看了（新西兰老爷爷）,老爷爷说语法没问题.可是我不明白这里的fruit为什么没s.有英语专业的朋友指点下吗.三十分送上.
问题描述：
英语fruit和vegetable的复数情况
Try to have more fruit and vegetables because they are rich in vitamins,high in nutrition yet low in calories
这句话我给老外看了（新西兰老爷爷）,老爷爷说语法没问题.
可是我不明白这里的fruit为什么没s.有英语专业的朋友指点下吗.
三十分送上.
答
fruit既可以做可数名词,也可以做不可数名词.
做可数名词,是在强调有多种水果时用；如：banana and other tropical fruits 香蕉和其它热带水果,There are kiwis , grapes, Durian and many other unknown exotic fruits on the table. 桌子上放着猕猴桃、提子、榴莲和许多叫不上名儿的外来水果.
做不可数名词,是将水果作为一个集合名词,一个大类来看待,不特指哪一个,也不区分其中不同的品种；如：Fresh fruit and vegetables provide fibre and vitamins. Apple and pear are all fruit.
vegetable是可数名词,但是指蔬菜时,不用a vegetable；如：不能说Is potato 【a】 vegetable? 应该是Is potato vegetable?
a vegetable 的意思一般是指“植物人”