YOU SAID:
Picked out a costume for tonight!
INTO JAPANESE
今夜のための衣装を選びました!
BACK INTO ENGLISH
I chose a costume for tonight!
INTO JAPANESE
私は今夜のための衣装を選んだ!
BACK INTO ENGLISH
I chose the costume for tonight!
INTO JAPANESE
私は今夜の衣装を選んだ!
BACK INTO ENGLISH
I chose the costume for tonight!
You've done this before, haven't you.