YOU SAID:
jack isnt the brightest crayon in the box
INTO JAPANESE
ジャックは箱の中で一番明るいクレヨンではない
BACK INTO ENGLISH
Jack is not the brightest crayon in the box.
INTO JAPANESE
ジャックは箱の中で一番明るいクレヨンではありません。
BACK INTO ENGLISH
Jack is not the brightest crayon in the box.
You've done this before, haven't you.