YOU SAID:

this is a very bad idea and you should not do it

INTO JAPANESE

これは非常に悪い考えであり、行うべきではありません

BACK INTO ENGLISH

This is a very bad idea and should not be done

INTO JAPANESE

これは非常に悪い考えであり、実行すべきではありません

BACK INTO ENGLISH

This is a very bad idea and should not be done