YOU SAID:
I need to go to the doctor it's an emergency!
INTO JAPANESE
私は医者に行く必要がありますそれは緊急事態です!
BACK INTO ENGLISH
I have to go to the doctor It is an emergency!
INTO JAPANESE
私は医者に行かなければなりませんそれは緊急事態です!
BACK INTO ENGLISH
I have to go to the doctor It is an emergency!
You've done this before, haven't you.