What part of speech is has passed?

Has passed is a verb.

To determine the part of speech of a specific phrase like "has passed," we need to break it down and analyze each constituent word individually.

1. "Has" is the third person singular form of the auxiliary verb "have." It is commonly used in present perfect tense constructions.

2. "Passed" is the past participle form of the verb "pass." It indicates a completed action in the past.

Considering these individual parts, "has passed" can be classified as a verb phrase. The auxiliary verb "has" functions as a helping verb, and "passed" functions as the main verb.

It is essential to remember that part of speech classification may vary depending on the context.