lieven:

> Why?

Because of the Ca'Non {lupDujHomDaq jIchegh} "I return on the shuttle".

The {DaH machegh} feels like the {lupDujHomDaq jIchegh} without the {lupDujHomDaq} part.

I understand as "now we return on.." and that's it.

chegh doesn't mean return on. chegh imparts a locative sense to its object. The object of chegh is the destination to which you are returning. Any other locative in the sentence refers to where the chegh is happening, not the destination.

So if Chang's party were returning by shuttlecraft, he could say things like

DaH lupDujHomDaq may'Duj wIchegh We are returning to the battlecruiser on the shuttlecraft now.

DaH lupDujHomDaq machegh We are returning on the shuttlecraft now.

DaH may'Duj wIchegh We are returning to the battlecruiser now.

Or, in fact, he could say

DaH machegh We are returning now.

-- 
SuStel
http://trimboli.name