What are the examples of nouns that always singular?

You're asking about uncountable nouns, also known as mass nouns. These nouns refer to things that can't be easily counted individually.

Here are some examples:

Abstract Concepts:

* Advice

* Information

* Knowledge

* Happiness

* Progress

* Love

* Time

* Music

Substances:

* Water

* Air

* Milk

* Sugar

* Sand

* Wood

* Plastic

Other:

* Furniture

* Luggage

* Equipment

* Money

* Research

* Scenery

* News

* Weather

Important Note:

While uncountable nouns are generally singular, they can sometimes be used in a plural sense when referring to different types or kinds of something. For example:

* "There are many kinds of music."

* "He gave me two pieces of advice."

Let me know if you'd like more examples or have any other questions!