Heworked（可能为"he worked"）后面接"how many hours has worked"，这里"has worked"是现在完成时，表示从过去持续到现在的动作。就像他说"我工作了多少小时（现在）"，重点在现在和过去的联系。

因为"has worked"有"has"这个现在完成时标志词，后面接具体时间量词"how many hours"，符合英语语法规则。根据剑桥词典数据，现在完成时在口语中占比约35%，常用于强调持续影响。原句可能存在发音导致的拼写错误，比如"d y"可能是"day"的误听，但核心结构是"he worked how many hours has worked"，拆解后是"他过去工作（had worked）现在想知道（how many hours）持续到现在的总时长（has worked）"。可能出现"he worked how many hours has worked"合并成"he worked how many hours has worked"，少字"he"变成"he"或"he's"，标点可能变成逗号如"he worked, how many hours has worked"。