Okay when u were born american like me and then u live with a mexican family how can you learn spanish so fast or can you?

Watch movies or shows in Spanish it helps a lot. Also try having conversations with people in Spanish with as much as you know. 

Because they recently talk to you in Spanish and your consouseness observe it and it transelates and you now know what it means and because your family teaches you

This is not a question. this is you asking us to do the work for you. we would be setting you up for failure if we did the work for you. if you have any questions, ask.