3 sentences

1. 我是个讲道理的人。

   wǒ shì gè jiǎng dào​li de rén.

   I'm a reasonable person.

   Source: OpenSubtitles

2. 他这人太浑，根本不讲道理。

   tā zhè rén tài hún, gēn​běn bù jiǎng dào​li.

   He is too unreasonable and doesn't listen to reason at all.

   Source: Dong Chinese Dictionary

3. 我们做人不能是非不分，一定要讲道理。

   wǒ​men zuò​rén bù néng shì​fēi bù fēn, yī​dìng yào jiǎng dào​li.

   We must not fail to distinguish between right and wrong; we must be reasonable.

   Source: Dong Chinese Dictionary