為什么這里的he had 不需要主謂倒置語序？請老師們指點一下.謝謝!
The inspector asked at what time he had arrived at the station.
at what time用以引導賓語從句，等于when引導的賓語從句，即：
The inspector asked whenhe had arrived at the station.
又如：
Please tell me at what time he can come. = Please tell me when he can come.