他们的歌都很好听。

Tāmen de gē dōu hěn hǎotīng.

Their songs are all good.

你说话的声音很好听。

Nǐ shuōhuà de shēngyīn hěn hǎotīng.

Your speaking voice sounds very nice.

你说话的声音真好听。

Nǐ shuōhuà de shēngyīn zhēn hǎotīng.

Your speaking voice is really pleasant.