Hey j3piper the B737NG is not a FBW aircraft. It has cables and pulleys.
Other the latest B737, I've not heard of any other Boeing aircraft referred to as "NG" types but then I am not a Boeing groupie so maybe I need to read more.
The B777 has a basic manual reversion function involving just enough control surfaces to keep it flying straight and level until higher levels of control are regained.
The FBW logic of Boeing and Airbus has certain important differences which allow or do not allow certain activities. For example, the B777 can be rolled inverted by pilot input while an Airbus cannot.