YOU SAID:
Adam is not a very good developer
INTO JAPANESE
アダムは、非常に良い開発者ではないです。
BACK INTO ENGLISH
Adam is not a very good developer.
INTO JAPANESE
アダムは、非常に優秀な開発者ではありません。
BACK INTO ENGLISH
Adam doesn't have to be a very talented developers.
INTO JAPANESE
アダムは、非常に才能のある開発者はありません。
BACK INTO ENGLISH
Adam is a very talented developers.
INTO JAPANESE
アダムは、非常に才能のある開発者です。
BACK INTO ENGLISH
Adam is a very talented developers.
That didn't even make that much sense in English.