问题描述：
英语,回答以下问题,大虾们
my mather was cooking while i was readng a book.与 while the girl was shopping ,the aline landed on the road ,为什么?俩个句子的主句,一个是过去进行时,另一个是过去式,以while引到的时间状语从句什么时候邮过去进行时,和过去式.
my mather was cooking while i was readng a book.与 while the girl was shopping ,the aline landed on the road ,为什么?俩个句子的主句,一个是过去进行时,另一个是过去式,以while引到的时间状语从句什么时候邮过去进行时,和过去式.
问题解答：
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