YOU SAID:
I'll have what she's having.
INTO JAPANESE
私は彼女がある必要があります。
BACK INTO ENGLISH
I have to have her.
INTO JAPANESE
私は彼女をしなければなりません。
BACK INTO ENGLISH
I have her.
INTO JAPANESE
私は彼女があります。
BACK INTO ENGLISH
I have her.
You should move to Japan!