5 sentences

1. 突然，电话的声音变了。

   tū​rán, diàn​huà de shēng​yīn biàn le.

   Suddenly the voice on the phone changed.

   Source: CCMatrix

2. 他的嗓音变得很低沉。

   tā de sǎng​yīn biàn​de hěn dī​chén.

   His voice became very low.

   Source: CCMatrix

3. 他的声音变得非常严肃。

   tā de shēng​yīn biàn​de fēi​cháng yán​sù.

   His voice turned very serious.

   Source: CCMatrix

4. 声音变得悲伤起来。

   shēng​yīn biàn​de bēi​shāng qǐ lai.

   The voice turned sad.

   Source: CCMatrix

5. 当她再次说话时，她的声音变了。

   dāng tā zài​cì shuō huà shí, tā de shēng​yīn biàn le.

   When she spoke again, her voice had changed.

   Source: CCMatrix