food既可数，也不可数。food指强调食物的种类的时候，就是可数名词，其复数形式为foods。food仅仅指“食物”“食品”的时候，是不可数名词。food表示特定的食品的时候，是可数名词。
扩展资料
Within three days they had exhausted their supply of food.
他们在三天之内就把所有粮食吃光了。
His company offers a flexible packaging service for the food industry.
他的公司为食品工业提供灵活的包装服务。
It seems such a waste to throw good food away.
把好的.食物扔掉似乎太浪费了。
We sell good quality food at reasonable prices.
我们以公道的价格出售优质食品。
That ought to be enough food for the four of us.
这些食物应该够咱们四个人吃了。
