Here are some examples:
* Il a menti. (He lied.)
* Elle ment toujours. (She always lies.)
* Ne me mens pas! (Don't lie to me!)
There are other ways to express the idea of "lied" depending on the context. For example, you could use:
* Dire un mensonge (to tell a lie)
* Tromper (to deceive)
* Faire un faux témoignage (to give false testimony)
It's important to choose the most accurate translation based on the situation.