Hi Jae Heon! 

Today I was puzzled by my friend. He is from France but he is so much better at English because his origin is British*. 

Anyway, sometimes he thinks I'm native speaker, like his other friends, so he speaks so fast (for me normal speed is fast).
Whenever he says to me something fast, I should say "could you elaborate what you just said?" *
This situation happens so many times because of my lack of English experience.
However I'm getting used to it and every time I learn novelty words and idioms.
I think this is very useful way of picking up words and idioms from him and I convince myself I will sort them out soon.
Then, I'm able to say "crisis over"
I tried to use words that I've learned recently so, please consider about it please^^

Comments:

I know that you are using words that you have learned, but these are some other ways you could say the same thing

*) "his origin is British" = "His heritage is British/ English" or "His mother/ father is from England".

*) "Could you elaborate what you just said" = Is good, BUT more natural to say "could you explain what you just said/ could you explain that" or "What do you mean, could you elaborate"

Hope this helps, if you have a question, you can message me; english or korean, it's all good. :)

Quick note about today

Today I was puzzled by my friend. He is from France but he is so much good (very good) at English because his origin is British. (He is from France but he speaks English very well because he is originally from Britain.) 
Anyway, sometimes he thinks I'm native speaker like his other friends so he speaks so fast (for me normal speed is fast).
Whenever he tells me something fast, I should say "could you elaborate that (what) you just said?"
This situation happens so many times because of my lack of English experience  experience speaking English. 
However I'm getting used to it and every time I learn novelty words and idioms.
I think this is a very useful way to pick up from him and I am convinced that I will sort myself out soon.
Then, I'm able to say "crisis over"



I tried to use words that I've learned recently so, please consider about it please^^

Quick note about today

Today I was puzzled by  about my friend. He comes from France but he is so much better at English than me because since he's got British roots.

However, sometimes he regards me as if I'm a native speaker, like his other friends, and speaks so fast (for me normal speed is fast).
Whenever he tells me something fastly I respond by saying "Could you please, elaborate more?" or "Could you please repeat it again?"
This situation happens occurs so many times, because of the lack of my English experience.
However I'm getting used to it and every time I learn novelty words and idioms.
I think this is a very useful way to pick up on something new from him and I am convinced that I will sort this problem out soon.
Then, I'll be able to say "crisis is over"



I tried to use words that I've learned recently so, please consider about this please^^