What is the part of speech does has go under?

"Has" can be two different parts of speech depending on how it's used:

1. Auxiliary verb: This is the most common use. It's part of the verb phrase and helps to form the present perfect tense (e.g., "He has eaten.").

2. Main verb: In rare cases, "has" can be the main verb, meaning it shows action or state of being. This is usually found in idiomatic expressions like: "He has a cold."

Here are some examples:

* Auxiliary verb: "She has been to Paris."

* Main verb: "He has a bad attitude."

Let me know if you'd like more examples or have other grammar questions!