Detailed explanation
This lesson focuses on past questions and negatives with did. The structure helps learners describe events and plans, and it should always be interpreted as part of a complete message rather than as an isolated formula. Before selecting a form, identify the subject, time reference, clause relationship, and the information that receives emphasis.
Formation is central. Use did not or didn’t before the base verb in negatives. Put did before the subject in questions and keep the main verb in the base form. Build the sentence in stages: identify the grammatical subject, choose the auxiliary or main verb form, and complete the clause in normal English word order. In negatives and questions, check whether the structure supplies its own auxiliary or requires another one.
The pattern can help users compare situations, ask for practical information, and connect form with time and quantity. These purposes may overlap, so context decides which interpretation is natural. Time expressions, determiners, linking words, and punctuation often provide evidence for the correct choice.
A useful contrast prevents overgeneralisation. Was and were form their own negatives and questions without did. Ask how the nearest alternative would change time, certainty, focus, politeness, or register. A grammatically possible sentence may still communicate the wrong relationship if that contrast is ignored.
The guided examples are complete messages. Notice how the target structure agrees with its subject and how the surrounding vocabulary makes the intended meaning clear. When producing a new example, preserve the relationship between form and meaning while changing the people, place, and lexical details.
A reliable self-check is to paraphrase the sentence in simpler language. If the paraphrase changes the time relationship, degree of certainty, or focus, review the original form. Compare the sentence with the common mistakes and explain why the corrected version is preferable.
How to form it
Use did not or didn’t before the base verb in negatives. Put did before the subject in questions and keep the main verb in the base form.