Verb forms can significantly impact the meaning of a sentence, and sometimes, even adjectives can act like verbs. The verb “to sleep” and the adjective “asleep” are used in similar ways. In this article, we’ll look at how they impact the meaning.
What Is The Difference Between “I Was Sleeping” And “I Was Asleep”?
“I was sleeping” and “I was asleep” mean the same thing. They both mean that someone was in a state of sleep. “Was sleeping” is the past continuous form of “to sleep,” while “asleep” is the adjective form meaning someone is sleeping.

Both words are almost identical in popularity and used for much the same reasons. You can see in this graph that there’s no real way to tell the two phrases apart. They’re both almost identical in written usage and have been for the last two centuries.

Meaning Of “I Was Asleep”
First, let’s look a little closer at the meaning of “I was asleep.” While both words mean the same thing, the way we get to the definition is different for both of them.
“I was asleep” uses the adjective “asleep” to show that we were in a state of sleep. It means that we’ve previously been asleep (using the past tense verb “was”), and we’re no longer asleep in the present.
The adjective “asleep” is used to describe our state. We can also use the adjective “awake” to state the opposite, meaning we’re no longer asleep and are ready to take on the day.
How To Use “I Was Asleep” In A Sentence
Let’s look at some examples of how we might use “I was asleep” in a sentence. In all of these cases, it’s possible to put “I was sleeping” in place of it to indicate just how similar they are, but we’ll show you some examples of both nonetheless.
- I was asleep when you called. Sorry I missed it!
- I’m so sorry I was asleep!
- I was asleep and can’t remember whether I did what I was supposed to!
- I was asleep all night; it was fantastic!
- I was asleep right up until the sun rose.
- I can’t believe I was asleep for so long.
As you can see, we use “I was asleep” to simply describe ourselves as being in the state of sleep for a period.
Meaning Of “I Was Sleeping”
“I was sleeping” is identical in meaning, but we use the verb form to get to the meaning slightly differently.
“I was sleeping” means that we took the action to sleep and had been sleeping previously. Using the past continuous form “was sleeping” means we were sleeping in the past but are no longer sleeping now.
Since verbs are “doing” words, in this instance, we’re talking about doing the thing. In this case, we’re talking about going to sleep as an action rather than a state. As we said, they’re the same definition; they just get to it in a different way.
How To Use “I Was Sleeping” In A Sentence
Let’s go over some examples of when “I was sleeping” is used. Again, we can replace all of these phrases with “I was asleep” to see how similar they are. Still, we’ll make sure to cover them.
- Sorry I was sleeping when you needed me!
- I was sleeping last night and couldn’t get out of bed.
- I was sleeping when you called, so I’m sorry I missed you!
- I can’t believe I was sleeping the whole time!
- I was sleeping, but now I’m not.
- It’s okay; I was sleeping anyway!
See how in each of these examples, you can also use “I was asleep” to the same extent. It’s up to you which one you prefer to use. There’s no noticeable difference between them for any native speakers to pick up on.
Synonyms For I Was Sleeping / I Was Asleep
Finally, let’s go over some synonyms you might be able to use. If you’re worried about the different forms, these might be better choices.
- I was fast asleep
This is a good alternative that we can use with the adjective “asleep.” However, it doesn’t work with the verb “sleeping” (“I was fast sleeping”), which helps clear up the confusion between the two.
- Resting
You can say “I was resting” as a verb instead of “sleeping,” and it would work just as well. It also doesn’t have an adjective form that works in the same way, so you won’t have to worry about confusing the forms.
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Martin holds a Master’s degree in Finance and International Business. He has six years of experience in professional communication with clients, executives, and colleagues. Furthermore, he has teaching experience from Aarhus University. Martin has been featured as an expert in communication and teaching on Forbes and Shopify. Read more about Martin here.