3 sentences

1. 他因为身体不适请了病假。

   tā yīn​wèi shēn​tǐ bù​shì qǐng le bìng​jià.

   He took sick leave because he was feeling unwell.

   Source: Dong Chinese Dictionary

2. 他请病假了，今天由我来替他。

   tā qǐng bìng​jià le, jīn​tiān yóu wǒ lái tì tā.

   He's on sick leave, so I'm filling in for him today.

   Source: Dong Chinese Dictionary

3. 他感冒了，所以向公司请了三天病假。

   tā gǎn​mào le, suǒ​yǐ xiàng gōng​sī qǐng le sān tiān bìng​jià.

   He caught a cold, so he took three days of sick leave from the company.

   Source: Dong Chinese Dictionary