DID
v.v. the past tense of 'do'. You use it to talk about actions or tasks that someone finished in the past.
v. the past tense of 'do'. Functions as the past-tense form of the lexical verb or as an auxiliary for questions, negation, and emphasis.
I did my homework last night.
She did everything she could to help the team win the championship game last weekend.
Although the committee did approve the initial proposal, they requested several significant revisions before the final project could move into the implementation phase.
As an auxiliary, it is followed by the base form of the main verb in questions and negatives.
Did you went to the store?Did you go to the store?When using 'did' as an auxiliary in a question, the main verb must remain in its base form, not the past tense.