YOU SAID:
I've got to go away, but baby it's cold outside
INTO JAPANESE
私は立ち去らなければならないが、赤ちゃんは外が寒い
BACK INTO ENGLISH
I have to leave, but the baby is cold outside
INTO JAPANESE
私は去らなければならないが、赤ちゃんは外が寒い
BACK INTO ENGLISH
I have to leave but the baby is cold outside
INTO JAPANESE
私は去らなければなりませんが、赤ちゃんは外が寒いです
BACK INTO ENGLISH
I have to leave but baby is cold outside
INTO JAPANESE
私は去らなければなりませんが、赤ちゃんは外が寒いです
BACK INTO ENGLISH
I have to leave but baby is cold outside
That didn't even make that much sense in English.