孩子在教室里小声地读书。

Háizi zài jiàoshì lǐ xiǎoshēng de dúshū.

The children are reading quietly in the classroom.

图书馆里要小声说话。

Túshūguǎn lǐ yào xiǎoshēng shuōhuà.

You must speak quietly in the library.

请你小声一点，说话不要那么大声。

Qǐng nǐ xiǎoshēng yìdiǎn, shuōhuà búyào nàme dàshēng.

Please speak more quietly; don't talk so loudly.