The document provides instruction on forming questions in the past tense in English. It explains that questions in the past are formed using "did" followed by the main verb in its base form. It gives the example "Did you go outside?" and explains that the answer drops "did" and changes the verb to its past form, like "Yes, I went outside." It emphasizes that using "did" indicates the question is in the past tense and that this is the key to writing questions in the past in English.