ai giúp mình làm bài này với ạ kiểu chuyển thể qua phủ định, khẳng định và câu hỏi ạ ----- Nội dung ảnh ----- Bài 3. Chuyển thể 1. I was in London last year. 2. She was at home yesterday. 3. Noah worked in Singapore 3 years ago. 4. Tung studied in Russia for 5 years. 5. There were a lot of candies here yesterday. 6. My father didn’t go to America last month. 7. Did you have any exams last week? 8. They did homework last Sunday. 9. I was at school this morning. 10. We had an English class this morning. 11. I bought a new computer last month. 12. My brother bought me a new guitar last Christmas. 13. George didn’t sleep well last night.