3 sentences

1. 我会让你提前知道。

   wǒ huì ràng nǐ tí​qián zhī​dao.

   I will let you know in advance.

   Source: Tatoeba

2. 她以前知道吗？

   tā yǐ​qián zhī​dao ma?

   Did she know before?

   Source: OpenSubtitles

3. 在你解决任何问题之前，知道你在解决哪个问题是很重要的。

   zài nǐ jiě​jué rèn​hé wèn​tí zhī​qián, zhī​dao nǐ zài jiě​jué nǎ​ge wèn​tí shì hěn zhòng​yào de.

   Before you solve any problem, it’s important to know which problem you’re solving.

   Source: CCMatrix