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杨善初中,简单介词in，on，behindunder,杨善初中,什么是介词？,杨善初中,介词表示词与词，词与句之间的关系,The cock is on the roof.,杨善初中,Where is the ball?,Its on the box.,Notes:on指在上面，表示两物体有接触。,杨善初中,Where is the ball?,Its under the box.,Notes：under表示“在正下方”,杨善初中,Where is the ball?,Its in the box.,notes：in表示“在里面”,杨善初中,Where is the ball?,Its behind the box.,notes：behind表示“在后面”,杨善初中,1,4,3,2,The cat is behind the fish bowl.,The cat is on the fish bowl.,The cat is under the fish bowl.,The cat is in the fish bowl.,杨善初中,
