1. The document discusses the past tense forms of the verb "to be" in English, which are "was" and "were". It provides examples of using these forms in simple past tense sentences and questions.
2. Exercises are provided for learners to practice forming sentences and answering questions in the past tense using "was" and "were". Short answers to yes/no questions using pronouns are also covered.
3. Additional context and information can be provided when answering questions in full sentences rather than just short answers.