First I stuck my papers in the entrance of a restaurant to keep them dry . But a man came out and told me to move them because someone might trip.

So I got a pasterboard box from the alley, set it on its side by the lamppost and put my papers inside.

問題：

請問set it on its side的意思是？照字面意思“把硬紙箱放在其一面的上方”講解不通。

set it on its side：

set是“放置”，it 指“盒子”。on its side 指 “放置的方法”，作“方法狀語”，不是地址狀語。意思是“一側(cè)放置；不是正面朝上”。

So I got a pasterboard box from the alley, set it on its side by the lamppost and put my papers inside.

【翻譯】于是我從小巷里找了一個石膏板盒子，把它側(cè)放在燈柱旁邊，把我的報紙放進里面。

on its side 這個使用方法，是“方法狀語”，不是“地址狀語”。我再舉幾個類似的例句：

He stood on his head to make the baby laugh. 他倒立著使嬰兒發(fā)笑。

He lay on his back, his hands behind his head. 他仰臥著，雙手扣著后腦勺。

He lay on his stomach, making an earnest business of sleeping. 他這會兒趴在床上，看樣子好象睡得正熟呢。