The past tense of has is had.

Has past or has passed?

Passed is only used as a form of the verb "pass," whereas past functions as a noun (the past), adjective (past times), preposition (just past), and adverb (running past).

Has and have example?

Has is used with the pronouns, i.e. He, She, it, this, that, etc. Have is used with pronouns I, you, we, they, these, those, etc. Examples: Have you ever dreamt of starting a new business.