YOU SAID:

I don't know how to smoke

INTO JAPANESE

たばこを吸う方法を知っているしないでください。

BACK INTO ENGLISH

You know how to smoke do not.

INTO JAPANESE

たばこを吸う方法を知ってはありません。

BACK INTO ENGLISH

Do not know how to smoke.

INTO JAPANESE

たばこを吸う方法を知っていません。

BACK INTO ENGLISH

Do not know how to smoke.