3 sentences

1. 年前家家户户都要大扫除。

   nián​qián jiā​jiā​hù​hù dōu yào dà​sǎo​chú.

   Every household does a thorough cleaning before the New Year.

   Source: Dong Chinese Dictionary

2. 请在大扫除时把地板拖干净。

   qǐng zài dà​sǎo​chú shí bǎ dì​bǎn tuō gān​jìng.

   Please mop the floor clean during the spring cleaning.

   Source: Dong Chinese Dictionary

3. 春节前我们家都要进行一次大扫除。

   Chūn​jié qián wǒ​men jiā dōu yào jìn​xíng yī cì dà​sǎo​chú.

   Our family does a thorough cleaning before the Spring Festival.

   Source: Dong Chinese Dictionary