What part of speech is written?

"Written" can be a few different parts of speech, depending on how it's used in a sentence:

* Past participle: This is the most common usage. It acts as an adjective or part of a verb phrase.

* Adjective: "I have a written contract." (Describing the contract)

* Part of a verb phrase: "He has written a letter." (Completed action)

* Past tense verb: "She written a letter yesterday." (This is incorrect grammar in standard English. "Wrote" is the correct past tense of "write.")

Let me know if you have a specific sentence in mind, and I can tell you the part of speech with more certainty!