1. Adverb: This is the most common usage. It modifies verbs, adjectives, or other adverbs, indicating degree or preference.
* Degree: "I am rather tired." (modifies the adjective "tired")
* Preference: "I would rather stay home." (modifies the verb "stay")
2. Adjective: "Rather" can function as an adjective, particularly in British English, meaning "somewhat" or "pretty".
* "It's a rather difficult problem."
3. Conjunction: Less commonly, "rather" can act as a conjunction, introducing a phrase that contrasts with the preceding phrase.
* "I would like to go to the party, rather than stay home."
4. Interjection: While not its primary function, "rather" can sometimes act as an interjection expressing surprise or mild disagreement.
* "Rather! I never thought you would agree."
To determine the part of speech, it's crucial to analyze the context in which "rather" is used.