Cách sử dụng
The word 'countable' is used to describe things that can be counted, such as numbers, objects or words. For example, when you have a pile of apples, you can count them and say "there are six apples". In this case, apples are countable nouns. However, some nouns are not countable, such as water or air. You cannot count them in the same way you can count apples. In grammar, countable nouns usually use plural forms and can be preceded by numbers such as "two cats" or "three books". It is important to know whether a noun is countable or not as this affects the grammar and sentence structure.