3 sentences for 攔 (lán — flag down)

1. 你不用帮我们拦计程车啦。

   nǐ bù yòng bāng wǒ​men lán jì​chéng​chē la.

   You don't have to hail a taxi for us.

   Source: OpenSubtitles

2. 我在路边拦了一辆出租车。

   wǒ zài lù biān lán le yī liàng chū​zū​chē.

   I hailed a taxi by the roadside.

   Source: Dong Chinese Dictionary

3. 他在单行道上反向行驶，被警察拦了下来。

   tā zài dān​xíng​dào shàng fǎn​xiàng xíng​shǐ, bèi jǐng​chá lán le xià​lai.

   He was pulled over by the police for driving the wrong way on a one-way street.

   Source: Dong Chinese Dictionary