4 sentences

1. 他知道那是死胡同吗？

   tā zhī​dào nà shì sǐ​hú​tòng ma?

   Does he know that's a dead end?

   Source: OpenSubtitles

2. 这是一条死胡同，走不通。

   zhè shì yī tiáo sǐ​hú​tòng, zǒu bù tōng.

   This is a dead end; there's no way through.

   Source: Dong Chinese Dictionary

3. 别走那条路，那是个死胡同。

   bié zǒu nà tiáo lù, nà shì gè sǐ​hú​tòng.

   Don't go that way; it's a dead end.

   Source: Dong Chinese Dictionary

4. 谈判已经陷入了死胡同，双方都不肯让步。

   tán​pàn yǐ​jīng xiàn​rù le sǐ​hú​tòng, shuāng​fāng dōu bù kěn ràng​bù.

   The negotiations have reached a deadlock, as neither side is willing to budge.

   Source: Dong Chinese Dictionary