求教句子成分分析,这是状语还是宾补

问题描述:

求教句子成分分析,这是状语还是宾补
Roy drove his bus into the back of it.
其中,into the back of it是作为目的/地点状语还是作为一个宾语补足语来修饰his bus?

into the back of it是介词短语,充当动词的状语,表示方向/地点.