3 sentences for 一口 (yī​kǒu — [accent])

1. 他操一口流利的英语。

   tā cāo yī​kǒu liú​lì de yīng​yǔ.

   He speaks fluent English.

   Source: Tatoeba

2. 他还能讲一口流利的日语。

   tā hái néng jiǎng yī​kǒu liú​lì de rì​yǔ.

   He can also speak fluent Japanese.

   Source: CCMatrix

3. 我生长在北京，讲一口标准的普通话。

   wǒ shēng​zhǎng zài běi​jīng, jiǎng yī​kǒu biāo​zhǔn de pǔ​tōng​huà.

   I grew up in Beijing and speak standard mandarin.

   Source: CCMatrix