Lay and lie. It’s important to get it right, even though many editors don’t know the difference.
Lay means to put something down. Please lay that down. Lay her to rest. I laid out the map. The detective laid a charge.
Lie means to repose, as in resting, sleeping or not moving. Lie down here. No, I’ll lie here. I’m going to lie down. And of course lie also means to tell an untruth.