求独立主格逻辑主语与分词

求独立主格逻辑主语与分词
求高手答疑:当表人体部位的词做逻辑主语时,及物动词用现在分 词,不及物动词用过去分词1.He lay there,his teeth set,his hand clenched,his eyes looking straight up.2.He stood there,his hand raised.3.She stood in front of him,with her eyes fixed on his face.4.everyone was doubled up ,tears streaming from their eyes,their shoulders rising and falling as wave after wave of laughter swept the crowd请问为什么上述4句中都用的是现在分词