different kinds of food请问这里食物表示种类吗,应该可以加s吧

I eat some food 食物为什么不加S,这是表示吃很多食物,而食物的种类不同,应该加S there are different()in the river括号里应该填kinds of fishs吗,鱼表示种类 是different kinds of food 还是different kinds of food s many different kinds of fish中的fish不是表示鱼的种类吗?为什么不用复数 different food.food要加s吗? kinds of food的food要不要加s They like different food and drinks.这里的food要加s吗? 英语翻译我喜欢的食物(My Favorite Food)I like many different kinds of f different kinds of fish fish作种类用复数,这里为什么是单数 I want to buy many different kinds of fruit.fruit要加S吗? We should eat different kinds of food with different vitamin 为什么能说many different kinds of food food不是不可数名词吗能用many修饰?