while the man _ the museum,his friend _ him

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while the man _ the museum,his friend _ him
A.visited saw B.visited seeing c.was visiting saw D.was visiting was seeing
还有 while 主句后面接过去进行时还是从句接.
when呢.

c.was visiting saw
when和while引导的时间状语从句中翻译成当...时的情况下
如果有一先一后两个动作先发生的动作通常用过去进行时后发生的动作用一般过去时和主句从句没有关系

while the man _ the museum,his friend _ him The doctor _(try) his best _(save) the _(die) man but _(fail It is his horse ,according to the old man ,_ saved him from At last,the _ man _(die),but his _ didn't cause too much sup The aged-man _ I saw yesterday was his father. when the man ______the museum ,his ftiends________him. _will we _ next week?we will visit the Museum of Natural His The accident _ him of his sight and the use of his legs. While I was walking on the street I _(meet) a friend of mine The old man never knew the news that his son won the prize _ The whites _ (visit )the Palace Museum once a year the man laid down his life to _ his 24 passenger