YOU SAID:
My sister ruined my book about harry potter
INTO JAPANESE
私の妹はハリーポッターについての私の本を台無しにした
BACK INTO ENGLISH
My sister ruined my book about Harry Potter
INTO JAPANESE
私の妹はハリーポッターについての私の本を台無しにした
BACK INTO ENGLISH
My sister ruined my book about Harry Potter
You've done this before, haven't you.