The local butcher,had lost his wallet while taking his savings to the post office.

问题描述:

The local butcher,had lost his wallet while taking his savings to the post office.
一本练习书修改成:The local butcher,was taking his savings to the post office but he lost this wallet.后面的从句he lost是正确的时态吗?要不要加上he had lost?

不用,原句用had lost是基于它后面的while,所以用的过去完成时,而改过之后的没有while,用正常的过去式就可以了.