Here are some examples:
* C'est un vrai ami. (He's a true friend.)
* Elle est une vraie beauté. (She's a real beauty.)
* Ce n'est pas vrai! (That's not true!)
* Le vrai bonheur est simple. (True happiness is simple.)
It can also be used in other contexts, like:
* Un vrai café (a real coffee, as opposed to instant)
* Vrai cuir (genuine leather)
Let me know if you have any other questions!