When do they carry it on the shoulder?
Rashi: After the smelter makes it, he carries it to their houses, for it cannot walk with its feet. Malbim
Where is "Tachtav"?
Radak: It is in its place.
Why does it say "v'Ya'amod"?
Radak: It stands there, where they put it. Malbim
What is the tense of "Yamish"?
Radak: It is Po'el Omed (the action applies only to the subject), like "Lo Yamish mi'Toch ha'Ohel" (Shemos 33:11).
What is the significance of "Lo Yamish"?
Malbim: Also this shows that it is not a god. It has no sensation or movement!
Why does it say "Yitz'ak Elav v'Lo Ya'aneh"?
Malbim: Do not say that in spite of all its shortcomings, there is benefit from it