was to...是过去以后吗

She was often to be found travelling by bus.

老师，怎么样理解 was often to be found。这是什么结构。

有 was to 结构呢，to 是后接不定式吗，to,没可能是介词吧？

was to do结构容易见到于文学作品中，用于表示从某个过去时间点跳跃式地描述以后的状况。是过去以后时间表示法的一种，但不同于would do。带有注定、势必的意思。比如：He left his hometown and was never to come back. 他离开了家乡，从此再也没回去过。你的句子也是类似的使用方法。句子可翻译为：他后来常常乘坐巴士旅游。