2 sentences

1. 我每个周末都换洗床单。

   wǒ měi gè zhōu​mò dōu huàn​xǐ chuáng​dān.

   I change the sheets every weekend.

   Source: Dong Chinese Dictionary

2. 他每天都会换洗内裤以保持个人卫生。

   tā měi tiān dōu huì huàn​xǐ nèi​kù yǐ bǎo​chí gè​rén wèi​shēng.

   He changes his underwear every day to maintain personal hygiene.

   Source: Dong Chinese Dictionary