lay / lie
One takes an object. One doesn’t. Then the past tenses make it worse.
-
Wrong: I’m going to lay down.
Right: I’m going to lie down.
No object. You’re doing it to yourself, so lie.
-
Wrong: Lie the report on my desk.
Right: Lay the report on my desk.
There’s an object—the report. So lay.
The test
Is there a thing being placed? If yes, lay. If the subject is just reclining, lie.
You lay a book down. You lie down. Lay needs a direct object the way put does—you can’t just “put.”
The part that’s genuinely unfair
The past tenses overlap, which is most of why nobody gets this right:
| Present | Past | Past participle | |
|---|---|---|---|
| Place something | lay | laid | laid |
| Recline | lie | lay | lain |
The past tense of lie is lay. So yesterday I lay down is correct, and looks wrong to almost everyone.
This is not you being careless. The language did this.
Now go lie down. You have earned it.