Question

there is a boy in the classroom,改为否定句

There are four crayons in my pencil case.对four提问
There is a boy in the classroom.改为一般疑问句 Mary is making the bed.改为否定句
She is doing the dishes.改为一般疑问句

Answer 1

1 How many crayons are there in your pencil case?
你的铅笔盒里有多少蜡笔?
2 Is there a boy in the classroom?
在教室里有一个男孩吗?
3 Mary isn't making the bed.
玛丽不在整理床铺.
4 Is she doing the dishes?
她在洗碗吗?