I'm from the northeast US. When describing the phenomenon of going to bed at night, or falling asleep, I always formulate the verb like that, as in "I went to bed at 10" or "I didn't fall asleep until midnight."

However I frequently hear the formulation "Last night, I slept at 10" or "I usually sleep at midnight". I'm interested in whether there's any interesting known dialect or historical distinction between the formulations. I now live on the west coast US and know many people who use these latter forms, and it still sounds wrong to my ear, like it's missing the helper verb (fall, go).

(The one case where I might crossover is in the sentence "I couldn't sleep until midnight", which sounds right to me, although "I didn't sleep until midnight" sounds wrong.)

It feels to me (though I don't have the professional vocabulary for this) that for me, "sleep" is an indefinite-duration, continuous action ("I'm sleeping"). So when I want to mark the time that it starts, I need to help it with "go to sleep". When I hear people say "I slept at 10", it sounds to me like they were asleep for only a moment, at 10 o clock, but not after, if that makes sense.

  • 2
    You’re right: that sounds odd. Could there be contamination from another language here?
    – tchrist
    Commented Feb 24, 2012 at 21:42

5 Answers 5


I don't live in America, but I don't usually say, "I fell asleep..."

Where I live, there seems to be a distinction.

"I slept at 10 o'clock" where I live seems to mean that we got into bed at ten o'clock.

However, we would then specify, "but I didn't fall asleep until eleven o'clock."

To my ears, there is nothing ungrammatical.

And, answering your other statement:

"I couldn't sleep until midnight", which sounds right to me, although "I didn't sleep until midnight" sounds wrong.)

There is a slight difference in meaning to me: I couldn't sleep until midnight indicates an inability to sleep, whether or not you waanted to.

"I didn't sleep until midnight" could mean that you were unable to fall asleep as well, but it has an additional meaning of perhaps you just didn't, that is, you maybe sat up late reading a book, and so didn't sleep until midnight.

  • Interesting! It seems that you are an example of the kind of speaker that I encounter here, because you do use the "to sleep" as an equivalent to my e.g. "get into bed", even in your final explanation. ("I didn't sleep until midnight" doesn't parse well for me under any interpretation.) Are you willing to share where you live, or in any case whether you live in an English-exclusive country/location? (Re @tchrist's comment)
    – Ben Zotto
    Commented Feb 25, 2012 at 22:11
  • I'm Australian. And to me, the usage of "to sleep" is perfectly normal. It's actually quite interesting that certain expressions that are the norm for me are new to others!
    – Bidella
    Commented Feb 27, 2012 at 0:07
  • Thanks Bidella. I'm marking this as the answer, since it appears evident that this is just a regional English thing.
    – Ben Zotto
    Commented Feb 28, 2012 at 17:35

I'm a school teacher and have found this quite frequently amongst children of non-native English speakers. It sounds awkward to me every single time I hear it and I'm pretty sure it comes down to incorrect usage, coming from an incorrect seepage of their family tongue into the English language.

For instance, I speak some Japanese. To indicate the time at which one goes to bed, one would use a phrase like "10 ji ni neta" (literally, "10 o'clock at slept"). It makes sense that this structure would be maintained with an incomplete understanding of standard usage of the language. I imagine that saying "go to sleep" would be misinterpreted as sleep being a destination of travel like "go to library" and therefore rejected as ridiculous.

The misuse of this verb is not terrible, of course. Language is here to serve as a means of communication and the loss of "go to" prior to "sleep" makes for little or no loss of that communication. The worst it does is make for ambiguity of the phrase "I slept late." Perhaps you can see that it could be taken two completely different ways.

  • This sounds highly likely as well. I'm interested in whether this phenomenon is only a foreign-language-seepage issue, or whether it ever exists natively. I'm leaving Bidella's answer (above) checked because s/he appears to be a native English speaker in a community where that use of the verb is natively grammatical.
    – Ben Zotto
    Commented Dec 31, 2014 at 1:53

It's not grammatically incorrect, but it doesn't make much sense. If someone says, "I did X at 10:00", that normally implies that the activity is something which only takes a short period of time to do completely. If it's something that takes a long time, we nomrally either say, "I did X from 10:00 until noon" or "I started doing X at 10:00".

So if someone says, "I slept at 10:00", I would find the sentence puzzling, but if I took it literally I wound understood it to mean that the speaker took a very brief nap, or dozed off for a moment and then was quickly woken up. I expect someone to say, "I slept from 10:00 until 6:00", or "I fell asleep at 10:00", or "I was asleep at 10:00".

"Sleep" is not the only word where this applies. If someone said, "I built a house on Thursday", I would understand this to mean that he was somehow an incredibly fast worker who completed the entire job in one day, not that he began work on Thursday and expects to be at it for many weeks or months. "I read a book at 10:00." "I learned Spanish at 10:00." Etc.

  • Sounds like you and I share the same dialect and interpretation. :) Certainly seems like (see @Bidella's answer) there is some variance here.
    – Ben Zotto
    Commented Feb 25, 2012 at 22:13

I teach high schoolers in NYC. I hear them saying this a lot. "I slept last night at 10". I googled it and found this page, because I was wondering where they get this from. My guess is that this is the way generation Z (or whatever we're calling them this week) speaks. For the time being, it is teen slang, and it is considered wrong, and it sounds weird to me, but in 40 years it will be standard English.

On a similar note, I remember my dad (born 1935) correcting me when I would say things like: "The party was soooo fun." "Fun is a noun," he'd say. Well, things change.


It's certainly less specific than your other examples, but strictly speaking there's nothing grammatically incorrect about using the word sleep (or any other verb) in that manner.

By depriving you of one or two details, the author is leading you towards making an assumption, which is probably the source of the awkwardness; one can't infer whether the subject fell asleep or was already sleeping at the specified time. Generally, people are not able to record the exact moment they fall asleep, so it seems reasonable to interpret this as referring to the time when the subject first tried to fall asleep, or when they thought they fell asleep.

I can't comment on the history of the phrase, I'm afraid.

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