4 sentences

1. 他压根就没去过那里。

   tā yà​gēn jiù méi qù guo nà​li.

   He has never been there at all.

   Source: Dong Chinese Dictionary

2. 他压根就不知道这件事。

   tā yà​gēn jiù bù zhī​dào zhè jiàn shì.

   He had no idea about this matter at all.

   Source: Dong Chinese Dictionary

3. ‎压根就没这个词！

   ‎ yà​gēn jiù méi zhè gè cí!

   That's not even a word!

   Source: OpenSubtitles

4. 他压根就不明白这句话是什么意思。

   tā yà​gēn jiù bù míng​bai zhè jù huà shì shén​me yì​si.

   He doesn't have the slightest clue what this sentence means.

   Source: Dong Chinese Dictionary