The proper use of "lie" and "lay" is tough for English speakers to grasp. We get it wrong all of the time. We use forms of "lie" when we mean "lay" and forms of "lay" when we mean "lie." Lie: "to assume a horizontal position on a supporting surface" or to tell a lie. Lay: "to place on a surface." What does it mean to "conjugate?" "To give the different forms of a verb." Let's conjugate "lie" and "lay" so we can understand what form to use when speaking or writing. Conjugation of "lie:" Present Past (to take a horizontal position/to tell a lie) (I) lie lay/lied (You) lie lay/lied (He/She) lies lay/lied (We) lie ...
~Reinforcing Proper English by Reviewing Punctuation, Grammar, and Spelling Rules