Lay vs. lie: you lay something down, but you lie down
English has been tangling these two verbs since the 1300s. One question sorts out the present tense, and one small table sorts out the rest.
WrongI'm going to lay down for a bit. Yesterday I laid in bed until noon.
RightI'm going to lie down for a bit. Yesterday I lay in bed until noon.
What people get wrong#
"I need to lay down." "The dog was laying in the sun." "She laid on the couch all afternoon." All three are everywhere in speech, song lyrics and text messages. By traditional usage rules, all three are wrong. Each should use a form of lie.
The core distinction is simple. According to Cambridge's grammar guide, lay means to put something down carefully in a flat position, and it must have an object. Lie means to be in, or put yourself into, a flat position, and it doesn't take an object. You lay a book on the table. You lie on the sofa.
Why it happens#
The American Heritage Dictionary's usage note says the two verbs have been confused for centuries, with evidence of lay meaning "lie" going back to the 1300s. It offers three reasons, and they explain nearly every mistake:
- There are two lays. Lay is the present tense of "put down," and it is also the past tense of lie. "Today I lie down; yesterday I lay down" is correct, and it looks wrong to almost everyone.
- The bedtime prayer. Lay was once used with a reflexive pronoun to mean "lie," which survives in "Now I lay me down to sleep." Drop the me and you get "lay down."
- They sound alike. "She lay down on the sofa" (lie) sounds the same as "I laid down the law" (lay).
Add the third verb in the family, lie meaning "say something untrue," which is regular (lied, lied), and it is a wonder anyone gets it right.
The fix#
First, ask one question: is there a thing being put down? If yes, use lay. If the subject is doing the reclining, use lie. Then use the right form from this table:
| Present | Past | Past participle | -ing form | |
|---|---|---|---|---|
| lay (put down; needs an object) | lay the book down | laid it down | have laid it down | laying it down |
| lie (recline; no object) | lie down | lay down | have lain down | lying down |
| lie (tell an untruth) | lie | lied | have lied | lying |
The rubbish had laid there for a week, and I was laying in bed when he called.
The rubbish had lain there for a week, and I was lying in bed when he called.
Nobody put the rubbish or me anywhere; we were just there. That's lie.
Two more traps, both flagged in the Oxford Learner's usage box. In past tenses, laid is often wrongly used where lay or lain belongs: "She had lain there all night," not "had laid." And the noun is a lie-down, not a lay-down. Note too that the past of lay is spelled laid, never layed.
Is "lay down" ever OK?#
Yes, whenever there's an object: "Lay down your weapons," "lay down the law," "lay the baby down." American Heritage also lists a couple of standard intransitive exceptions, such as the nautical "lay at anchor" and the phrasal verb "lay for."
In casual speech, "I'm gonna lay down" is so common that few listeners will blink, and plenty of famous song titles use it. In writing that will be edited, graded or published, the traditional rule still applies, and the editor will notice.
Sources
Every factual claim on this page links to one of these. Checked October 26, 2026. See how we source.
- Cambridge Dictionary, English Grammar Today: Lay or lie? dictionary.cambridge.org
- American Heritage Dictionary: usage note at 'lay' ahdictionary.com
- Oxford Learner's Dictionaries: lay (Which Word? lay / lie) oxfordlearnersdictionaries.com