Nok wants to know more about Anna's weekend.

Nok: 'Did you cook dinner yesterday?'
Anna: 'No, I didn't cook. I ordered pizza instead!'
Nok: 'Did you watch TV?'
Anna: 'Yes, I did. I watched a documentary about the ocean.'
Somsak: 'Did you sleep early?'
Anna: 'No, I didn't sleep early. I stayed up until midnight!'
Nok: 'I understand now — for questions and negatives, we use "did" and "didn't", and the main verb goes back to its base form.'
Anna: 'Perfect. Notice: I didn't cook, not I didn't cooked. The -ed only appears in positive sentences.'

For past simple questions, put 'Did' before the subject and use the base verb: Did you cook? For negatives, use 'didn't' + base verb: I didn't cook. This rule works for both regular and irregular verbs — that's the good news! 🔊