YOU SAID:
If it is raining, I have to wear my coat
INTO JAPANESE
雨が降っている場合、私はコートを着用しなければならない
BACK INTO ENGLISH
If it is raining, I have to wear a coat
INTO JAPANESE
雨が降っている場合、私はコートを着用しなければならない
BACK INTO ENGLISH
If it is raining, I have to wear a coat
You've done this before, haven't you.