2 sentences

1. 别对我没完没了地说教。

   bié duì wǒ méi​wán​méi​liǎo de shuō​jiào.

   Stop preaching to me endlessly.

   Source: Dong Chinese Dictionary

2. 别对我说教。

   bié duì wǒ shuō​jiào.

   Don't lecture me.

   Source: OpenSubtitles