1. past tense of ‘do’; performed or carried out an action
2. used as an auxiliary verb to form questions in the past tense
Usage: auxiliary verb
3. used as an auxiliary verb to form negative statements in the past tense
Usage: auxiliary verb

Examples

• She did her homework after dinner.
• They did a great job on the project.
• Did you see the movie last night?
• Where did he go yesterday?
• I did not finish the book.
• We did not expect such a large crowd.
• He did tell me about the meeting.
• You did make the right choice.