YOU SAID:

This is not a very good sentence

INTO JAPANESE

これは非常に良い文章ではないです。

BACK INTO ENGLISH

This is not very good writing.

INTO JAPANESE

これは非常によくない書き込み。

BACK INTO ENGLISH

This is very well written.

INTO JAPANESE

これは非常によく書かれて。

BACK INTO ENGLISH

This is very well written.