YOU SAID:
I'm going to lose my marbles
INTO JAPANESE
私はビー玉を失うつもりです
BACK INTO ENGLISH
I'm going to lose a marble
INTO JAPANESE
私は大理石を失うつもりです
BACK INTO ENGLISH
I am going to lose the marble
INTO JAPANESE
私は大理石を失うつもりです
BACK INTO ENGLISH
I am going to lose the marble
Well done, yes, well done!