He sank the knife into her back. He sank to his knees, shaking, and covered his face with his hands. He sank under the weight of age. He's annoying. He's an odd man; so we'll have him referee. He's an ordinary looking guy. He's antisocial. He's an unfaithful sort. He's an unlucky guy. He's anxious about his examination result. He's a party animal. He's a perfectionist.