1.Does it belong to him?
does it belong to him,doesn't it?
whom doesn't it belong?
Doesn't it belong to him or to me?
What does belong to him?
2.Did he offer it?
Did he offer it, didn't he?
Who offered it?
What did he offer it?
Whom did he offer to him or to me?
3. Was it delayed?
What was delayed?
It was delayed, wasn't it?
Was it delayed or not?
When it was delayed?