Soup, the most sustaining and comforting of all combinations, is a natural for pasta. After all, noodles come alive in liquid. Noodles are elegant in clear broths; rustic in rough-textured soups; and comforting, to say nothing of nourishing, in soups wispy with greens. The recipes here reflect the universal attraction of noodles and pasta to soups—pasta in soups with greens and beans, shrimp and crabmeat, meat and vegetables. It's hard to imagine a soup in which some pasta would not be an improvement. Good memories are made with noodles and soup. They begin in childhood, with pastina and alfabetini floating in a golden broth, and are rekindled every time we sit down to a steaming bowl of pasta-filled broth.