歌词：yi-a-yi-a-o and on his farm he has a duck yi-a-yi-a-o with a quarkquark here and quarkquark there here quark there quark everywhere quarkquark old macdonald had a farm yi-a-yi-a-o and on his farm he has a dog yi-a-yi-a-o with a ruffruff here and ruffruff there here ruff there ruff everywhere ruffruff old macdonald had a farm yi-a-yi-a-o