YOU SAID:
I know well who I have to make.
INTO JAPANESE
私は誰を作らなければならないかをよく知っています。
BACK INTO ENGLISH
I know very well who I have to make.
INTO JAPANESE
私は誰を作らなければならないかをよく知っています。
BACK INTO ENGLISH
I know very well who I have to make.
That didn't even make that much sense in English.