English grammar rule Did past
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
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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. -
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? -
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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