the way to use "to" or "for" correctly.
for example:
Your speech would be very confusing for your listener.
why Here use "for" rather than "to".

I really want to know how to use "to" and "for" correctly.
and also I wonder what feeling makes the native speakers do the choice between "to" and "for", when they want to explain things,问题补充:I mean "to" or "for" sb, what makes a native speaker do the choice.问题补充:another sentence:
The sound would be very choppy,mechanical and unemotional to an American.
why there's a "to" rather than a "for".问题补充:thanks a lot for help, I'm now waiting for your opinion. thanks again.

Question

the way to use "to" or "for" correctly.
for example:
Your speech would be very confusing for your listener.
why Here use "for"  rather than "to".

I really want to know how to use "to" and "for" correctly.
and also I wonder what feeling makes the native speakers do the choice between  "to" and "for", when they want to explain things,问题补充:I mean "to" or "for" sb, what makes a native speaker do the choice.问题补充:another sentence:
The sound would be very choppy,mechanical and unemotional to an American.
why there's a "to" rather than a "for".问题补充:thanks a lot for help, I'm now waiting for your opinion. thanks again.

Answer

A thing is important to you. (Noun or Gerund)

Example: Your studies are important to you. (Studying is important to you.)

2. Doing something is important for you. (to + Verb)

It is important for you to study.