将下列句子改成否定句、一般疑问句,并对划线部分提问.
1.The children had a good time in the park.（The children 划线）
2.There were about 990 people at the mall.（990 划线）
3.Ann did her homework last night.（last night 划线）
4.I read an English book two days ago.（an English book 划线）
5.My brother was in the park just now.（in the park 划线）
6.They practiced English yesterday.（practiced English 划线）
7.Tina played the guitar last weekend.（the guitar 划线）
8.It was snowy last winter.（snowy 划线）