English Explanations
1. To form the negative past tense with verbs other than be, put did not or didn't before the base form of the verb.
2. Use did + subject + the base form of the verb to form a yes/no question in the past tense. Use did with all subjects. Use yes + subject pronoun + did to form a positive short answer to a yes/no question in the past tense. Use no + subject pronoun + didn't to form a negative short answer in the past tense.
3. To form questions with question words in the simple past tense, use a question word + did + subject + the base form of the verb. Question words are what, when, where, who, why, and how. To answer this type of question, use subject + the simple past tense of the verb.
Grammar
THE SIMPLE PAST TENSE: NEGATIVE FORMS AND QUESTIONS
Negative Statements
Subject + didn't + verb.
Yes/No Questions
Did + subject + verb?
Short Answers
Yes, + subject pronoun + did.
No, + subject pronoun + didn't.
Questions with Question Words
Question word + did + subject + verb?
Question Words
what when where who why how
