Has One Piece Outsold The Bible

Can anyone tell me where we have to use "has" and where we have to use "have"? I am confused. Can anyone explain me in a simple way?

has one piece outsold the bible 1

It's helpful here to undo the subject-verb inversion that makes this sentence a question and turn it into a statement: Trump's political views has changed on Israel's war in Gaza. [incorrect] or Trump's political views have changed on Israel's war in Gaza. [correct] The subject is views and the verb is has/have changed. Has always goes with a singular subject, and have with a plural one. Since ...

has one piece outsold the bible 2

I have read a similar question here but that one talks about the usage of has/have with reference to "anyone". Here, I wish to ask a question of the form: Does anyone has/have a black pen? What ...

has one piece outsold the bible 3

auxiliary verbs - Does anyone "has" or "have" - English Language ...

has one piece outsold the bible 4