2.在其他定语从句中

It was a question Jane would have doubted if she had not been there to hear it．要是简没有亲耳听过，这就是她要怀疑的问题了。

After what seemed like ages we popped out of the cloud and confirmed our dead-reckoned position as overhead the airfield of Vila Real，where we would have landed but it had no avgas．

如数年般的时间过去之后，我们终于突破云层，确认我们原本以为必死无疑的位置其实就在维尔利亚镇机场上空:如果不是因为飞机没有汽油，我们本来要在那里降落的。