What are the rules for using words or is?

You're asking about the correct usage of "word" and "words" or "is" and "are". Let's break down the rules:

"Word" vs. "Words"

* "Word" is singular: It refers to one single word.

* "Words" is plural: It refers to more than one word.

Examples:

* Singular: The word "cat" has three letters.

* Plural: The words "cat," "dog," and "bird" are all names for animals.

"Is" vs. "Are"

* "Is" is used with singular subjects (one person, place, or thing).

* "Are" is used with plural subjects (more than one person, place, or thing).

Examples:

* Singular: The cat is sleeping.

* Plural: The cats are playing.

Putting It Together

Sometimes, you might need to use both "word" and "is" or "words" and "are" together.

* Example: "The word 'cat' is a noun."

* Example: "The words 'cat,' 'dog,' and 'bird' are all nouns."

Let me know if you'd like to see more examples, or if you have a specific sentence you're struggling with!