Lay, Lie, Lied, Lain: When Do We Use Which? | Britannica
https://www.britannica.com/story/lay-lie-lied-lain-when-do-we-use-which
WEBThe past tense of lie is lay, but not because there is any overlap between the two verbs. So when you say, “I lay down for a nap,” you’re actually using the verb lie, not lay, despite the way it sounds. Past Participle: Lay: She had laid the blanket down before she left. Lie: I had lain there for some time before getting up.
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