YOU SAID:
You the one that i want
INTO JAPANESE
1 つは、私がしたいです。
BACK INTO ENGLISH
It is one that I want.
INTO JAPANESE
私が欲しいものです。
BACK INTO ENGLISH
This is what I want.
INTO JAPANESE
これが私の欲しいものです。
BACK INTO ENGLISH
This is what I want.
You've done this before, haven't you.