3 sentences

1. 你现在完蛋了。

   nǐ xiàn​zài wán​dàn le.

   You're done for now.

   Source: OpenSubtitles

2. 要是它们袭击我们就完蛋了。

   yào​shi tā​men xí​jī wǒ​men jiù wán​dàn le.

   We're finished if they attack us.

   Source: OpenSubtitles

3. 如果你打破了错误的规则，就完蛋了。

   rú​guǒ nǐ dǎ pò le cuò​wù de guī​zé, jiù wán​dàn le.

   If you break the wrong rules, you’re finished.

   Source: CCMatrix