especially可以修饰时间或者原因状语从句，根据《麦克米伦高阶》：especially + if / when / as / while / because / since…，例如：
He did not want to upset his father, especially as his mother was so ill. 他不想让父亲烦心，尤其是在母亲病得这么重的时候。
You will need to book your ticket in advance, especially if you want to reserve a seat. 你需要提前订票，尤其是想订到座位的话。
Of or relating to soil, especially as it affects living organisms.  与土壤有关的，尤指土壤影响生物体的情况时。
In the second lef it will be hard, especially because we'll play away at Roma.  第二回合非常困难，特别是我们是客场。
They really turned up for us on this thing. It's really important, especially while America's mourning and grieving... 他们在这件事上非常支持我。这非常重要，特别是在美国出于悲痛和忧伤中时。
Noise is unpleasant, especially when you are trying to sleep. 噪音令人讨厌，尤其当你想睡觉的时候。