* Noun: This is the most common usage. It refers to the tree itself.
* Example: "The weeping willow tree swayed gently in the breeze."
* Adjective: This refers to something made from willow wood or resembling willow.
* Example: "She wore a willow basket on her arm."
* Proper Noun: If it's used as a name, such as in "Willow Creek," then it's a proper noun.
Let me know if you have a specific sentence you want to analyze. 😊