about to do.when...与此类句型意思相同的句型有哪些啊?

这个考点我把它总结为【用when引导时间状语从句的句型结构搭配】：
be about to do sth when 刚要,即将；正要做某事,突然发生其他事
be doing sth when 正在做某事突然
had done sth when 刚刚做过某事突然
be at the point of doing sth when 就在做某事的关键时刻突然
scarcely...when/hardly...when 几乎未来得及就…；刚一…就…
no sooner...than 一…就…