The carpenter singing his, as he measures his plank or beam, the mason singing his, as he makes ready for work, or leaves off work; the boatman singing what belongs to him in his boat – the deckhand singing on the steamboat deck; the shoemaker singing as he sits on his bench – the hatter singing as he stands. —“i hear america singing,” walt whitman in what three ways does whitman use repetition in this passage from his poem?