over there的确是介词短语.
但是最好不要写成 put over there the box,除非是在口语中.
这种结构（及物动词 + 宾语 + 介宾）中,除非宾语结构比较冗长,才会写成：及物动词 + 介宾 + 宾语.
如：My father impressed on me the importance of work.
= My father impressed the importance of work on me.
而the box非常简短,为避免理解偏差,最好不要写成 put over there the box.
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