2 sentences

1. 你讲的话我完全听不懂。

   nǐ jiǎng de huà wǒ wán​quán tīng bu dǒng.

   I don't understand a word you're saying.

   Source: OpenSubtitles

2. 我完全听不懂她在讲什么。

   wǒ wán​quán tīng bu dǒng tā zài jiǎng shén​me.

   I have no idea what she's talking about.

   Source: OpenSubtitles