Usage of 'For + To'

It seems that you understand this usage correctly.

It's a bit much to explain, but if you google "For + noun + To + Infinitive," you'll get lots of helpful links:

http://www.englishgrammar.org/infinitive-clauses-introduced-nounpronoun/

https://elt.oup.com/student/solutions/advanced/grammar/grammar_05_012e?cc=kr&selLanguage=ko

I did this for you. - correct

I did this so you can see your kid. - correct

I did this FOR you CAN see you kid - WRONG

I did this for you TO see your kid. - correct


Difference between
"for you to see your kid"
and
"so you can see your kid."

For You To - in this example means YOU WILL, or You SHOULD. I WANT YOU TO.
So you can - in this example means that You Can If You Want To.


For some reason I am confused. - Correct
So (that) some reason I am confused - WRONG

(let me use the first example in dialog)

*The student was watching the teacher as he explained the lesson.
"For some reason I am confused," the student said. "Why did you write this here? I do not see why it is important or how it is relevant."
[Some Reasons are confusing the child.]
{Because of = for}

I am here for a coffee. - correct
I am here so (that) I CAN GET a coffee. - correct.
I am here TO GET a coffee. - correct.

I am here FOR GET a coffee. - wrong.
But you do not say,
I am here 'because of' Coffee. -correct,
because it would sound like you had too much coffee and not enough sleep.


I did it BECAUSE [(this is the first example with Because) You do not use the word "of" ]
-I wanted you to be able to see your kid.
-You wanted to see you kid.
-You can see your kid NOW.
-you SHOULD see your kid.
(saying, "I did it because you Should see your kid.) is the most soft hearted way of saying it. Where as, the other ways sound more Macho.


Here, let me try, and use one last example So That you CAN understand.
- correct

(* here ) is used as a "Wait A Moment" or an "Allow Me To" comment.

Here, let me try, and use one last example FOR you TO understand.
Here, allow me to use one last example To help you understand
or
Here, let me try, and use one last example to help/make you understand.



I hope this was all helpful. If you thought this helped ask me anything. My e-mail is [email protected]

I assume you are Spanish because FOR + TO mean similar things in your language, and they DO NOT in mine.
The Grammatical structure of these sentences mean significantly different things, but by using a few other words in the sentence you can ask the same question.

To understand
Make understand
can understand
all mean very different things.* I hope this makes you understand how the words TO + FOR + So That are very different.
I know in your language it is the same way. GRAMMAR makes it sensible*

I think that the people that say FOR + TO mean the same things simply do not understand completely.