past tense did

A form like "have was" is not grammatical because there is an auxiliary verb, and the main verb has past tense. mary did you know pentatonix lyric The past tense, if any, has to be on the auxiliary verb, like in "had been": "had" is past tense, "been" is a past participle. how many times did brazil win the world cup Similarly when the word "do" is the auxiliary, it has to take the past tense