为什么“Are they healthy food and drinks?”中的food没有加s,而drink却加了s?

为什么“Are they healthy food and drinks?”中的food没有加s,而drink却加了s? 饮食：food and drinks drinks为什么要加s? Juice and water are healthy drinks,drink为什么要加s,water ,juice, They like different food and drinks.这里的food要加s吗? health foods为什么要+s,而healthy food为什么不加s,那么junk food 加s的方式一步一样 juice,water and milk are healthy( ).A.drinks B.drink C.food 健康食品的英文是healthy food为什么food后面不加s food and drink 与food and drinks There are lots of healthy food and drinks 同义句 Juice,water,and milk are healthy drinks.drink不是不可数名词吗?怎么这里要加 my favourite food is eggs .为什么egg加s了? 英语翻译3.Healthy food and drink.Meat and fish are healthy food.