Sam Benton, the local butcher, had lost his wallet while taking his savings to the post-office.

来源：百度知道 编辑：UC知道 时间：2024/07/04 06:40:32
为什么taking his savings为什么不用was taking his savings

这句话要加was的话,he也必须加,要么he和was都不要.
所以以下2种都可
Sam Benton, the local butcher, had lost his wallet while taking his savings to the post-office.
Sam Benton, the local butcher, had lost his wallet while he was taking his savings to the post-office.

while 后省略he was
Sam Benton, the local butcher, had lost his wallet while (he was)taking his savings to the post-office.