YOU SAID:
I do not know how to do it
INTO JAPANESE
彼らはそれをどのようにするかを知らない。
BACK INTO ENGLISH
They do not know how to do it.
INTO JAPANESE
彼らはそれをどのようにするかを知らない。
BACK INTO ENGLISH
They do not know how to do it.
That didn't even make that much sense in English.