5 sentences

1. 请恕我直言。

   qǐng shù wǒ zhí​yán.

   Please forgive my frankness.

   Source: Dong Chinese Dictionary

2. 我就直言了，这个方案根本行不通。

   wǒ jiù zhí​yán le, zhè​gè fāng'àn gēn​běn xíng bù tōng.

   I'll be blunt: this plan simply won't work.

   Source: Dong Chinese Dictionary

3. 他因为直言进谏而被贬到了偏远地区。

   tā yīn​wèi zhí​yán jìn​jiàn ér bèi biǎn dào le piān​yuǎn dì​qū.

   He was demoted to a remote area for speaking out bluntly with his advice.

   Source: Dong Chinese Dictionary

4. 古人认为，当下级发现上级有错时，应当直言规谏。

   gǔ​rén rèn​wéi, dāng xià​jí fā​xiàn shàng​jí yǒu cuò shí, yīng​dāng zhí​yán guī jiàn.

   Ancient people believed that when a subordinate finds a superior to be in error, they should offer direct admonition.

   Source: Dong Chinese Dictionary

5. 他性格耿直，在会议上敢于对错误的方案直言相证。

   tā xìng​gé gěng​zhí, zài huì​yì shàng gǎn​yú duì cuò​wù de fāng'àn zhí​yán xiāng zhèng.

   He has a straightforward personality and is brave enough to directly speak out against flawed proposals during meetings.

   Source: Dong Chinese Dictionary