Past simple negatives and questions

Learning objectives

By the end of this lesson you can write past simple negatives and questions, and you can explain why the main verb stays in its base form.

The rule: did + base verb

In past simple, "did" does two jobs. It shows that the action is in the past, and it helps form the question or negative. Because "did" already carries the past meaning, the main verb returns to its base form. This is different from affirmative past simple, where the main verb itself changes: "She walked", "They went", "He wrote". Compare:

• Affirmative: "I visited the museum."
• Negative: "I did not visit the museum."
• Question: "Did you visit the museum?"

The negative form is subject + "did not" (or "didn't") + base verb: "We didn't finish on time," "She didn't call back," or "They didn't agree with the plan." The question form is "did" + subject + base verb: "Did you enjoy the film?", "Did he arrive early?", or "Did the meeting last long?" This system is regular for almost all verbs, including irregular ones, because the irregularity is hidden inside the affirmative form only.

Short answers and question words

Short answers repeat "did" or "didn't": "Did you send the email? — Yes, I did." "Did she attend? — No, she didn't." Do not repeat the main verb in the short answer. With question words, keep the same order: question word + "did" + subject + base verb. Examples: "Where did you stay?", "Why did he leave early?", "When did the class end?", "Who did you meet?", or "How did they solve the problem?" "Who" as the subject does not need "did": "Who called you?" is correct because "who" is already the subject.

Common mistakes

• "I didn't went" instead of "I didn't go."
• "Did you went home?" instead of "Did you go home?"
• "She didn't called" instead of "She didn't call."
• "Did he not came?" instead of "Did he not come?" or "Didn't he come?"
• Repeating the main verb in a short answer: "Yes, I visited."
• Using "was/were" with a main verb: "Was you go?" instead of "Did you go?"

Choosing between "didn't" and "wasn't"

Learners sometimes confuse past simple negatives with past "be" negatives. Use "didn't" + base verb for actions: "I didn't eat breakfast." Use "wasn't/weren't" for states and descriptions: "I wasn't hungry." Compare "She didn't come to the party" (action) with "She wasn't at the party" (state). Both can be true, but they answer different questions. If the sentence contains a main verb such as "go", "eat", "call", or "finish", use "didn't".

Practice

Rewrite each sentence as requested.

1. Make negative: "They finished the project."

2. Make a question: "She called you."

3. Make negative: "He was at the station."

4. Make a question: "You saw the accident."

5. Correct: "Did you went to the shop?"

6. Correct: "She didn't came on time."

7. Question word: "You stayed where?" -> "Where ___?"

8. Short answer: "Did they agree? — Yes, ___."

Answers: 1. They didn't finish the project. 2. Did she call you? 3. He wasn't at the station. 4. Did you see the accident? 5. Did you go to the shop? 6. She didn't come on time. 7. did you stay. 8. they did.

A speaking task

Tell a partner about three things you did yesterday and three things you did not do. Your partner asks follow-up questions using "did". For example: "I cooked dinner, but I didn't clean the kitchen." "Did you cook pasta?" "No, I didn't." This keeps the base-verb rule active in real speech.