YOU SAID:
Hello! I'm your friends friend!
INTO JAPANESE
こんにちは!私はあなたの友達の友達です!
BACK INTO ENGLISH
Hello! I am your friend's friend!
INTO JAPANESE
こんにちは!私はあなたの友達の友達です!
BACK INTO ENGLISH
Hello! I am your friend's friend!
You've done this before, haven't you.