YOU SAID:
my opportunist neighbour stole the jumper from my closet
INTO JAPANESE
私の日和見主義者の隣人が私のクローゼットからジャンパーを盗んだ
BACK INTO ENGLISH
My opportunist neighbor stole a jumper from my closet
INTO JAPANESE
私の日和見主義者の隣人は私のクローゼットからジャンパーを盗んだ
BACK INTO ENGLISH
My opportunist neighbor stole a jumper from my closet
That didn't even make that much sense in English.