* us: This is a pronoun. It stands in for a noun (presumably "we").
* move: This is a verb. It describes the action of changing position or location.
However, "us move" is not a complete sentence. It lacks a subject-verb agreement. To make it a complete sentence, we need to add a verb that agrees with the pronoun "us":
* Let us move. (Here, "let" is the verb, and the sentence has a subject-verb agreement.)
Let me know if you'd like to explore other examples!