1. Who could eat four ice cream yesterday?
Whose brother could eat four ice cream yesterday?
What could his brother eat yesterday?
When could his brother eat four ice cream?
How many ice cream could his brother eat?
Could his brother eat four ice cream yesterday?
What could his brother do yesterday?
His brother could eat four ice cream yesterday, couldn't he?
2. Who is swimming in the swimming pool?
How many boys are swimming in the swimming pool?
What are the boys doing?
Where are the boys swimming?
Are the boys swimming in the swimming pool?
The boys are swimming in the swimming pool, aren't they?