4 sentences for 不知 (bù​zhī — not know)

1. 我不知这件事的真相。

   wǒ bù​zhī zhè jiàn shì de zhēn​xiàng.

   I don't know the truth about this matter.

   Source: Dong Chinese Dictionary

2. 真不知该如何谢你。

   zhēn bù​zhī gāi rú​hé xiè nǐ.

   I don't know how to thank you.

   Source: OpenSubtitles

3. 在下有一事相求，不知可否请您帮个忙？

   zài xià yǒu yī shì xiāng​qiú, bù​zhī kě​fǒu qǐng nín bāng gè máng?

   I have a favor to ask. I wonder if you might be able to help me?

   Source: Dong Chinese Dictionary

4. 这个杯子的分子结构不知怎么被改变了。

   zhè​gè bēi​zi de fēn​zǐ jié​gòu bù​zhī zěn​me bèi gǎi​biàn le.

   Somehow the molecular structure of this cup has been altered.

   Source: OpenSubtitles