2 sentences for 規 (guī — admonish)

1. 老师规劝学生要珍惜时间。

   lǎo​shī guī quàn xué​sheng yào zhēn​xī shí​jiān.

   The teacher advised the students to cherish their time.

   Source: Dong Chinese Dictionary

2. 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