Đổi các câu sau sang thể phủ định và thể nghi vấn
1. She was at home yesterday
- ........................................................................................... ? ........................................................................................... 2. They were on the beach two days ago -........................................................................................... ? ........................................................................................... 3. Phong and Nam were in the library this morning -........................................................................................... ? ........................................................................................... 4. Students were at the zoo last Sunday -........................................................................................... ? ........................................................................................... 5. I was at work yesterday -........................................................................................... ? ...........................................................................................