Μέση Φωνή practice

I am trying to learn the passive voice verbs. I understand the types that are conjugated like this:

 συκών/

          ομαι

          εσαι

          εται

          όμαστε

          εστε ( όσαστε)

          ονται

 

But why am I also finding examples like τσαώνουντ?  This ending is not on my previous example because it is ουντ instead of ονται. 

 

Is there another type of conjugation that I am not aware of?

 

Thanks