I went to sleep secure in the knowledge that I was not alone in the house.
I went to sleep secure in the knowledge that I was not alone in the house.
secure 是形容词(安心的),作“方法状语”,表明睡觉的方法。
in the knowledge that I was not alone in the house,缘由状语。
that I was not alone in the house,是 knowledge 的同位语从句。