不能,要分词短语作状语
非谓语动词是这么来的 After he had finished his homework ,the boy went to play computer games. the boy 和he ,主语是同一个人,所以从句的主语和介词可以省略,用非谓语动词的形式表示。 但你直接用had,从句就不完整了,必须把主语和介词加回去才符合游戏规则。