English grammar rule Did past

Rule Frequency
In Top 100 rules

Do, does, or did can sometimes be used as helping verbs. Sometimes, they add emphasis, form a question, or combine with not to express a negative. In these situations, use the root form of the main verb.

Examples of 'Did past' rule
  1. Expressing negatives:
    Incorrect Polly do not keeps her receipts
    Correct Polly does not keep her receipts.
    Incorrect Tim did not attended the show.
    Correct Tim did not attend the show.
  2. Asking questions:
    Incorrect Does Dorothy enjoys ice cream?
    Correct Does Dorothy enjoy ice cream?
    Incorrect Did you pushed the cart?
    Correct Did you push the cart?
  3. Emphatic do:
    Incorrect I do thinks you are avoiding me.
    Correct I do think you are avoiding me.
    Incorrect The snake did coiled around the mouse!
    Correct The snake did coil around the mouse!
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