DIE NOAVI, DIE. YOU SUCK LEARN TO PLAY. OMG WHAT IS WRONG WITH YOU! NEVER JOIN MY GAMES AGAIN! YOU THREW, YOU GT ISP AFK THREW THE GAME FOR SOMEONE, YOU ARE A CHEATER! YOU CHEAT WITH THAT GUY OVER THERE! HACKER, ABC , oh wait, if you are abc im ok with you. Good luck.
it just depends on what they're having trouble with really, usually they'll ask or be visibly unsure of something and it's easy to assume then what they dont' know & then go from there