manhattan 5th 时态疑惑【已解决】

angelina30205

谢谢Jay, 我对时态的理解又清晰了点儿~

angelina30205

Unfortunately for the commuters who lost their lives when the bridge collapsed, the engineer had not been honest at the preliminary public safety commission hearing, when he had been questioned about the structure’s weight-bearing abilities.

Jay,这句话是我摘自Ron在beatthegamt上的例句。when在这句话中，表示的是“在...的时候”吧？表达的是两个主从两谓语动词的平行吧？

这和下面句子中的when表意不同。可为什么？两句子的结构完全一样啊，when...都表示某时点啊~
She played with their friends when the babysitter arrived.