3 sentences

1. 裁判向犯规的球员出示了一张黄牌。

   cái​pàn xiàng fàn​guī de qiú​yuán chū​shì le yī zhāng huáng​pái.

   The referee showed a yellow card to the player who fouled.

   Source: Dong Chinese Dictionary

2. 对方球员在禁区内犯规，判给了一个点球。

   duì​fāng qiú​yuán zài jìn​qū nèi fàn​guī, pàn gěi le yī gè diǎn​qiú.

   An opposing player fouled in the penalty area, resulting in a penalty kick.

   Source: Dong Chinese Dictionary

3. 他在考试中犯规，因此成绩被作废。

   tā zài kǎo​shì zhōng fàn​guī, yīn​cǐ chéng​jì bèi zuò​fèi.

   He cheated during the exam, so his results were invalidated.

   Source: Dong Chinese Dictionary