3 sentences for 往后 (wǎng​hòu — from now on)

1. 往后切不可鲁莽行事。

   wǎng​hòu qiè bù kě lǔ​mǎng xíng​shì.

   You must not act recklessly from now on.

   Source: Dong Chinese Dictionary

2. 往后你可千万别再迟到了。

   wǎng​hòu nǐ kě qiān​wàn bié zài chí​dào le.

   From now on, make sure you're never late again.

   Source: Dong Chinese Dictionary

3. 从今往后，这就是你要住的地方了。

   cóng jīn wǎng​hòu, zhè jiù shì nǐ yào zhù de dì​fang le.

   This is where you will live from now on.

   Source: OpenSubtitles