* Noun: This is the most common usage. It refers to a state of harmony or concurrence.
* Example: "They reached an agreement on the contract."
* Verb: This form means to concur or to be in accord.
* Example: "I agree with your opinion."
* Adjective: This form describes something that is in harmony or accord.
* Example: "The agreement was unanimous."
Let me know if you have a specific sentence in mind, and I can help you identify the part of speech!