4 sentences

1. 你为什么跟他谈生意？

   nǐ wèi​shén​me gēn tā tán shēng​yi?

   Why are you doing business with him?

   Source: OpenSubtitles

2. 我们是在谈生意上的事。

   wǒ​men shì zài tán shēng​yi shang de shì.

   We were talking about business.

   Source: OpenSubtitles

3. 我跟她谈了生意。

   wǒ gēn tā tán le shēng​yi.

   I discussed business with her.

   Source: Tatoeba

4. 我是来谈生意的。

   wǒ shì lái tán shēng​yi de.

   I'm here to talk business.

   Source: OpenSubtitles