Once upon a time, a cat and a mouse became friends.

Meaning: This sentence tells us that a cat and a mouse, which are usually thought of as enemies, became friends.

Choice of Words: Once is a word that indicates a time in the past. Upon means on top of or in a position above something. A is an indefinite article that refers to one of something. Cat is a common house pet. And is a conjunction that connects two words, phrases, or clauses. A is an indefinite article that refers to one of something. Mouse is a small rodent that is often found in homes. Became is a verb that means to come to be or to change into something. Friends are people who like each other and spend time together.

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Related Expressions