Answer:
One more than a duet.
Built of metal or wood to divide. It will make us good neighbors, if you stay on your side. What is it?
Proof you've done your time in school
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
What comes one time in today, three times in tomorrow and never in the future?
What can never be put in a saucepan?