What is the difference between a countable noun and an uncountable noun?

A countable noun is a noun that can be counted, such as "book", "chair", "table". An uncountable noun is a noun that cannot be counted, such as "water", "love", "time".

Here are some examples of countable and uncountable nouns:

• Countable nouns: book, chair, table, water, love, time
• Uncountable nouns: water, love, time

The key difference between countable and uncountable nouns is that countable nouns can be counted, while uncountable nouns cannot.