2 sentences for 后头 (hòu​tou — behind)

1. 他走在后头，离我们很远。

   tā zǒu zài hòu​tou, lí wǒ​men hěn yuǎn.

   He was walking at the back, far behind us.

   Source: Dong Chinese Dictionary

2. 他猛地一加速，把其他选手远远地甩在后头。

   tā měng​de yī jiā​sù, bǎ qí​tā xuǎn​shǒu yuǎn​yuǎn de shuǎi zài hòu​tou.

   He suddenly accelerated and left the other contestants far behind.

   Source: Dong Chinese Dictionary