u/Double-Butterfly487

I'm self studying with Athenaze, and I'm trying to understand why καθεύδω is accented κάθευδε in the imperative, instead of something like καθεῦδε. Finite verbal forms are accented recessively so I'm not sure accentuation of the imperative goes in the opposite direction.

Similarly, why is the imperative of φιλέω accented φίλει, especially when the 3rd person singular is accented φιλεῖ?