Omission of Auxiliary Verbs in Questions/Negatives (e.g. He not go)

In English, we almost always need an auxiliary verb (like do, does, did, is, are, have) when forming questions and negatives in the present simple or past simple tenses — unless “be,” “have,” or a modal verb is already the main verb.

Common mistakes

• ❌ He not go to school. → ✅ He does not go to school.
• ❌ You like pizza? → ✅ Do you like pizza?
• ❌ She went not to the party. → ✅ She did not go to the party.

This mistake often happens when learners try to apply their native grammar patterns to English, but in English the auxiliary is necessary for correct structure and tense marking in questions and negatives.

Remember: in present simple and past simple, the main verb stays in base form. The auxiliary carries the tense or negative.

• He doesn’t eat meat. ✅ not he not eats ❌
• Did she call you? ✅ not She called you? ❌