Question

what is the helping verb of past indefinite tense​

Answer 1

-Ing.

Hope it will help you.

Answer 2

Subject + Did + Not + Verb (Ist form) + Object + (.) In Past Indefinite Negative Tense, 'Did Not' is used with Ist form of Verb. In positive tense, 2nd form of verb is used but when 'Did' is used in Past Indefinite Negative and Interrogative tenses, Ist form of Verb (base form) is used with 'Did'.