YOU SAID:
I don't want to clean my room.
INTO JAPANESE
私は部屋を掃除する必要がありません。
BACK INTO ENGLISH
I don't have to clean my room.
INTO JAPANESE
私は部屋を掃除する必要がありません。
BACK INTO ENGLISH
I don't have to clean my room.
You've done this before, haven't you.