1. You know the answer.
you don't know the answer.
do you know the answer ?
2. He has breakfast at 8.00
he doesn't have breakfast at 8.00
does he have breakfast at 8.00 ?
3. He loves her
he doesn't love her
does he love her ?.
4. Students wear uniforms.
students don't wear uniforms
do students wear uniforms ?
5. Her children like sweets.
her children don't like sweets
do her children like sweets ?