YOU SAID:
I don't not how to breathe very well
INTO JAPANESE
私はあまり上手に呼吸する方法がない
BACK INTO ENGLISH
I have no way to breathe very well
INTO JAPANESE
私はとてもよく呼吸する方法がありません
BACK INTO ENGLISH
I have no way to breathe very well
You've done this before, haven't you.