fruit and vegetables are healthy food 为什么food用单数?
人气：453 ℃ 时间：2019-09-25 09:46:28
解答
food 在这里 表示 食物 是不可数名词 food 既是可数名词又是不可数名词.
指"食物、食品"的时候是不可数名词.
We can't live without food and water
强调食物的种类时就是可数名词.
There are all kinds of foods on the table
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