system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 the proper usage of further/farther and lay/lie please?

I'm an American and these things baffle me, I've been asked to explain it to some family members that aren't native speakers and I always feel like an idiot.

Thanks in advance.

**Edit** Thank you for the concise explaining I appreciate it.  Marked as answered.
gpt
**Far***ther* is about distance.

*Lie* is something you do to yourself, you lie (yourself) down. 

*Lay* is something you do to something else. you lay it down.
 
**Difficulty:** The past tense of  verb *lie* is **LAY**, while the past tense of the verb *lay* is **Lain**. Amateur word nazis do not know this and wrongly attack anyone that correctly uses **Lay** as in past tense.