Khan Academy: Plural and Singular Nouns

Learn the difference between singular and plural nouns.

Learn to distinguish common and proper nouns from one another!

What's the difference between a common noun and a proper noun?

A concrete noun refers to a physical object in the real world, such as a dog, a ball, or an ice cream cone. An abstract noun refers to an idea or concept that does not exist in the real world and cannot be touched, like freedom, sadness,...

Learn to distinguish between abstract and concrete nouns!

You may have been hearing a lot about the 'singular they' recently. But what is it? How does it work, what is its history, and is it grammatical? Let's find out.

The plural of 'dog' is 'dogs', but what is the plural of 'leaf'? Khan Academy's resident grammarian explains.

The plural of 'whale' is 'whales', but what's the plural of 'child'? David, Khan Academy's resident grammarian, explains.

There is *one* extremely rare case in which we use apostrophes to make things plural. David and Paige, KA's resident grammarians, discuss this unusual case.

A noun is a word that describes a person, place, thing, or idea. Examples of nouns include names, locations, objects in the physical world, or objects and concepts that do not exist in the physical world; for example, a dream or a theory.