改写下面的句子
1. There were about nine hundred people at the concert.. 否定句：__________________________________________
一般疑问句：________________________________________
对划线部分提问：____________________________________
2. Ann did her homework yesterday evening.
否定句：__________________________________________
一般疑问句：________________________________________
对划线部分提问：____________________________________
3. My brother was in the park just now.
否定句：__________________________________________
一般疑问句：________________________________________
对划线部分提问：____________________________________
4. I am a teacher.
一般过去时：___________________________________ 3 years ago.
5. She is at school today.
一般过去时：___________________________________ yesterday.
一般疑问句：____________________________________________
对划线部分提问：_________________________________________
6. They buy a lot of pineapples.
一般过去时：__________________________________ this morning.
一般疑问句：____________________________________________
对划线部分提问：_________________________________________