The key is the tense. The past tense of "lie" is "lay", which is where the confusion comes from, whereas the past tense of "lay" is "laid". Handy chart[1]. Af

The key is the tense. The past tense of "lie" is "lay", which is where the confusion comes from, whereas the past tense of "lay" is "laid". Handy chart[1]. After I laid bricks this morning, I was tired and lay down. Not: *After I layed bricks this morning, I was tired and lied down. [1]: https://grammarist.com/usage/lay-lie/ https://grammarist.com/usage/lay-lie/