3 sentences

1. 他转过身去背对着墙。

   tā zhuǎn guò shēn qù bèi duì zhe qiáng.

   He turned his back to the wall.

   Source: AI Challenger 2017

2. 我从来没有背着他做任何事。

   wǒ cóng​lái méi​yǒu bèi zhe tā zuò rèn​hé shì.

   I have never done anything behind his back.

   Source: CCMatrix

3. 想象一下你正背着一个背包。

   xiǎng xiàng yī​xià nǐ zhèng bēi zhe yī​ge bēi​bāo.

   Imagine that you are carrying a backpack.

   Source: CCMatrix