Practice
A while and awhile: understand the difference
Sign in to saveThe two spellings look almost the same, but they work in different places. If you can put for before the expression, write a while. If the word directly describes an action, awhile is the usual one-word choice.
Choose a while for a time noun phrase and awhile for the adverb meaning for a while, especially after a preposition and in common expressions with ago or back.
Read and practice
Read the examples and try the written questions in this guide. Listening recordings are not available for this lesson yet.
Try the written questions
a while and awhile /ə waɪl/ and /əˈwaɪl/
The short answer
Write a while after a preposition, as in for a while or in a while, and in a while ago or a while back. Write awhile when it directly follows and modifies a verb, as in wait awhile.
Please wait awhile before you call again.
Why it works: Awhile directly modifies wait and means for a while.
5 more examples
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We waited for a while outside the clinic.
For is a preposition, so it is followed by the noun phrase a while.
Not this:We
waited awhileoutside the clinic. What changes: Awhile can directly modify waited when the sentence does not use the preposition for. -
I will call you back in a while.
In is a preposition, so use the two-word noun phrase.
Not this:I will call you
back awhile. What changes: This form is unclear because awhile does not normally follow the preposition in this time expression. -
We met a while ago at a training course.
The established expression with ago uses a while.
Not this:We met
awhile agoat a training course. What changes: Some writers use this spelling, but a while ago follows the traditional distinction. -
Sit awhile and look at the map.
Awhile modifies sit and has the meaning for a while.
Not this:Sit
for a whileand look at the map. What changes: This has the same time meaning, but for requires the noun phrase a while. -
After a while, the room became quieter.
After is a preposition, so it takes a while.
Not this:
After awhile, the room became quieter. What changes: This spelling is common in informal writing, but after a while keeps the noun phrase after the preposition.
Read the full guide
Check the words before the expression. A preposition needs the noun phrase a while: for a while, after a while, and in a while. The words ago and back also follow a while. When no preposition is present and the word answers how long an action continues, awhile is a useful traditional choice.
Start with the grammatical job
A while is a noun phrase. It names a period of time. Awhile is an adverb. It describes an action that continues for a period of time. This difference explains the usual spelling choice.
The repair took a while.
Here a while names the amount of time, so it acts as a noun phrase.
Use a while after a preposition
A preposition such as for, in, after, or before is followed by a noun phrase. Write a while in these patterns. This is the quickest reliable check for many sentences.
She stayed after a while to ask one more question.
After introduces a time phrase, so the two-word noun phrase follows it.
Which spelling follows in: in a while or in awhile?
Write in a while because in is a preposition and needs the noun phrase a while.
Use awhile directly after an action
Awhile often comes directly after a verb. It tells you how long the action continues and means for a while. You can use it with verbs such as wait, rest, sit, stay, and talk.
Rest awhile before you begin the next task.
Awhile describes how long the person should rest. It can be replaced by for a while.
Remember ago and back
The expressions a while ago and a while back use the two-word form. In both, a while is the period before the past point that ago or back refers to. Learn these expressions as fixed patterns.
I read that article a while back.
A while back points to an earlier time. It does not use awhile as an adverb after a verb.
Use the replacement check
When you think awhile may fit, try replacing it with for a while. If the sentence still has the same structure and meaning, the one-word adverb is likely to fit. Do not use this check after a preposition, because for a while already contains the noun phrase.
The guests talked awhile after dinner.
The guests talked for a while after dinner has the same meaning, so awhile can modify talked.
Can you write for awhile if you mean a period of waiting?
Write for a while. For is a preposition, so it needs the noun phrase a while.
Choose a clear form in careful writing
Both spellings appear outside the traditional pattern, and readers usually understand the intended time meaning. In school, work, or edited writing, use the structure rule. It gives the reader a consistent signal about whether the expression is a noun phrase or an adverb.
The queue moved slowly for a while, then it began to move faster.
For needs a while because the phrase names the period during which the queue moved slowly.
Before you go
Remember this
Use a while after a preposition and with ago or back. Use awhile when it directly modifies a verb and means for a while. Check the structure before the expression, then choose the spelling that fits its job in the sentence.
Practice with the written examples
You can practice with the written questions in the Learn tab. Each answer includes an explanation.
Try the written questionsListening test not available yet
This lesson does not have the recordings needed for a listening test. Use the written questions in the guide to check your understanding.
Try the written questionsQuestions about "A while and awhile: understand the difference"
What is the difference between a while and awhile?
A while is a noun phrase that means a period of time. Awhile is an adverb that means for a while. In careful writing, use a while after a preposition and use awhile when it directly modifies an action.
We waited for a while outside the clinic.
Do I write for a while or for awhile?
Write for a while. For is a preposition, and it is followed by the noun phrase a while. The same pattern applies after in, after, before, and other prepositions.
We waited awhile outside the clinic.
Can I use awhile after a verb?
Yes. Awhile can follow a verb when it means for a while. You can write wait awhile, rest awhile, or sit awhile when no preposition comes before the time expression.
I will call you back in a while.
Is a while ago correct?
Yes. A while ago is the traditional two-word form. A while back follows the same pattern. In both expressions, a while names a period before the past time that the phrase refers to.
I will call you back awhile.
Are a while and awhile always used differently?
The distinction is not followed in every informal text, and readers usually understand either spelling. If you want a consistent form for careful writing, use a while after a preposition or with ago and back, and use awhile directly after a verb.
We met a while ago at a training course.