I have seen many times verbs which look singular have an apparently plural meaning, usually in poetry. What is the reason for this? Am I just identifying it wrong? An example is: 'cetera nox, et nos, et turris conscia novit' '[Only] we, the night, and the mindful tower know the rest.' (from Ovid: Heroides 18) Am I right in saying that 'novit' is third person singular active? And even if it were for some reason passive, it would still refer to the plural 'cetera'.