I like oranges和They like salad这两个句子中为什么 oranges要加S而salad不加S呢

Do you like salad?salad 为什么不加s He likes oranges.like为什么加S Does she like salad?的like加s吗? i would like cabbage为什么这里不加s,而i like cabbages中要加s? They like oranges I like salad.What about____(they) 为什么she would like中like不加s 水果沙拉的英语是fruit salad吗?如果是,为什么fruit不加s? 为什么“I like toy cars”中car要加“s”? 用he likes music I like oranges I like eggs They like apples和 I like oranges oranges 划线 划线提问 like为什么加s?