How to Interpret Body Language If you know how to read a person’s body language,you will understand a lot of things in your life.You will know if someone is lying to you,thinks you’re lying or anywhere in between.Here is some advice on how to interpret1 body language of any human being. Now start looking at and noticing a person’s eyes.If someone can’t keep solid eye contact with you,they could be lying.So you should watch out if you ask them a question and their eyes begin to turn back,forth,side,up,or down.Or,they could be very nervous;they might not be nervous with you but with themselves.Downward eyes mean guilt2.Direct eye contact means honesty,interest for you and trust. Look at his/her hands and feet now.If they are tapping3 their feet a lot that means they are bored.If someone is sitting with their legs crossed and rocking their legs back and forth that means they are annoyed.