👧When did you look at that photograph?你什么时候看的那张照片？
👦I looked at that photograph an hour ago.我一小时前看的那张照片。
👧When did she walk across the park?她什么时候穿过公园的？
👦She walked across the park last week.她上周穿过公园的。
👧When did they wash their hands?他们什么时候洗手的？
👦They washed their hands a minute ago.他们一分钟前洗的手。
👧When did he work in an office?他什么时候在办公室工作的？
👦He worked in an office the year before last.他前年在办公室工作的。