YOU SAID:
omg did you see the new girl
INTO JAPANESE
ああ、新しい女の子を見ましたか
BACK INTO ENGLISH
Oh, did you see the new girl?
INTO JAPANESE
ああ、新しい女の子を見ましたか?
BACK INTO ENGLISH
Oh, did you see the new girl?
That didn't even make that much sense in English.