I think they were about to fall,

问题描述:

I think they were about to fall,

那要看在什么地方用的了,可能是“我认为他们将要(垮台)(落下)(堕落)(战死)”都有可能...也许还有别的可能...

个人认为可以拆开来 think about 和they were to fall
那分开来的i think about 我认为 觉得
they were to fall 他们要掉下去 坠落(个人觉得是自杀)
然后组合就变成了我觉得他们要自杀/(失足)掉下去)

be about to do 即将...
fall的意思就多了:摔倒,垮台,沦陷,减少等.根据上下文选择.
我觉得他们快要xx了.