IIRC, {bIQtIq(-Daq) vIghoS} would be something like “I follow the river”, whereas {bIQtIqDaq jIghoS} is “I come to the river”. I’m still fuzzy on the interpretation of the distinction, but I do remember there being a distinction.

bIQtIqDaq jIghoS would mean At the river, I go. Maybe you're standing by the river, then you walk along some path near it. Or you walk in circles next to it. Whatever the path being followed when you ghoS, it's not the river.

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SuStel
http://trimboli.name