4 sentences for 突 (tū — sudden)

1. 病人的情况发生了突变。

   bìng​rén de qíng​kuàng fā​shēng le tū biàn.

   The patient's condition took a sudden turn.

   Source: Dong Chinese Dictionary

2. 他突然站了起来。

   tā tū rán zhàn le qi​lai.

   He suddenly stood up.

   Source: Dong Chinese Dictionary

3. 由于气候异常，今年春天突降暴寒。

   yóu​yú qì​hòu yì​cháng, jīn​nián chūn​tiān tū jiàng bào hán.

   Due to abnormal climate, there was a sudden cold snap this spring.

   Source: Dong Chinese Dictionary

4. 家中突遭变故，他的生活轨迹彻底改变了。

   jiā zhōng tū zāo biàn​gù, tā de shēng​huó guǐ​jì chè​dǐ gǎi​biàn le.

   A sudden misfortune in his family completely changed the course of his life.

   Source: Dong Chinese Dictionary