YOU SAID:

I am really good at not existing

INTO JAPANESE

私は存在しないが本当に得意します。

BACK INTO ENGLISH

I does not exist is really good.

INTO JAPANESE

ない本当に良いです。

BACK INTO ENGLISH

It is not really good.

INTO JAPANESE

本当に良くないです。

BACK INTO ENGLISH

It is really not good.

INTO JAPANESE

それは本当に良いではないです。

BACK INTO ENGLISH

Is not really good at it.

INTO JAPANESE

本当にそれが得意ではありません。

BACK INTO ENGLISH

Not really good at it.

INTO JAPANESE

それで本当に良い。

BACK INTO ENGLISH

It really good.

INTO JAPANESE

それは本当に良い。

BACK INTO ENGLISH

It is really good.

INTO JAPANESE

それは本当に良いです。

BACK INTO ENGLISH

It is really good.