对的!独立主格结构.等于：
After he (had) finished his homework,I went home.
由于主从句主语不统一,在非谓语动词前加逻辑主语,构成独立主格结构.哈我写的是对的`谢谢 谢谢只是没有你写的时间精准。对不？？祝你进步！夏日愉快！