Which Term??!

Yes. Yes.

infinitive: to treat (someone) like a star.
perfect infinitive: to have treated (someone) like a star.
passive infinitive: to be treated like a star.
passive perfect infinitive: to have been treated like a star.

passive infinitives: to be seen, to be heard, to be known, to be loved, to be invited, ...

thanks for your answer.

i thought i can use past participle only for irregular verbs and not for regular, is that true?

and is (to) be+ past participle the same like passive infinitive?

(sorry my english is not very good)

Annabella

You can use the past participle of any verb to form a passive infinitive. It does not have to be an irregular verb.

(to) be + past participle is exactly what a passive infinitive is, yes.

CJ

Thank you soooooooo much, helped me a lot!