4 sentences

1. 为什么天空中会有云朵？

   wèi​shén​me tiān​kōng zhōng huì yǒu yún​duǒ?

   Why are there clouds in the sky?

   Source: CCMatrix

2. 云朵不停地变换着。

   yún​duǒ bù​tíng​de biàn​huàn zhe.

   The clouds are constantly changing.

   Source: CCMatrix

3. 云朵覆盖一切。

   yún​duǒ fù​gài yī​qiè.

   The clouds cover everything.

   Source: CCMatrix

4. 过了一会儿，云朵开始变化起来了。

   guò le yí​huì​r, yún​duǒ kāi​shǐ biàn​huà qǐ lai le.

   After a short while, the clouds started to change.

   Source: CCMatrix