OK, one little joke before starting...
A little kid tell his teacher: "I've no pencils".
The teacher replied: "You must say: "I have no pencils." See ? "You have no pencils", "He has no pencils", "She has no pencils", "We have no pencils", "You all have no pencils", "They have no pencils." Understood ?"
The kid: "Yes, understood. But then, where have all the pencils gone ?"
I'll let you laugh on this one... while I finalize my paper.