Sport is uncountable. According to the truth, do sport why do sports

Sport is uncountable. According to the truth, do sport why do sports

There are two types
Sports means "Sports", uncountable; sports means "Sports", countable

Do you like sports or do you like sports?

First

When to add s to the word sport, and
There are also vegetable, fruit, this kind of very special ah, the teacher did not explain clearly, why sometimes add s, sometimes do not add s, add s means what, do not add s means what!

These are plural forms of words. Some words are directly followed by "s", some by "es", and some are plural forms, which are the same as the prototype, such as fruit, fish, vegetable. We need to judge whether they are singular or plural according to the modifiers in front. Some are different words, such as the plural of medium