YOU SAID:

maybe that was not a good idea

INTO JAPANESE

多分それは良いアイデアではなかった

BACK INTO ENGLISH

Maybe it is a good idea is not

INTO JAPANESE

多分それは良いアイデアはないです。

BACK INTO ENGLISH

Perhaps it is not a good idea.

INTO JAPANESE

あの は良い考えではありません。

BACK INTO ENGLISH

That is not a good idea.

INTO JAPANESE

あの は良い考えではありません。

BACK INTO ENGLISH

That is not a good idea.