3 sentences

1. 自此以后，他再也没有提起过那件事。

   zì​cǐ yǐ​hòu, tā zài yě méi​yǒu tí​qǐ guo nà jiàn shì.

   Since then, he has never mentioned that matter again.

   Source: Dong Chinese Dictionary

2. 自此一违，没想到竟然过了十年才再次见面。

   zì​cǐ yī wéi, méi xiǎng​dào jìng​rán guò le shí nián cái zài​cì jiàn​miàn.

   Since we parted ways back then, I never imagined ten years would pass before we met again.

   Source: Dong Chinese Dictionary

3. 既然协议已经签署，自此双方将维持和平。

   jì​rán xié​yì yǐ​jīng qiān​shǔ, zì​cǐ shuāng​fāng jiāng wéi​chí hé​píng.

   Now that the agreement has been signed, both sides will maintain peace henceforth.

   Source: Dong Chinese Dictionary