Rulebase

One Word or Two? Common Confused Pairs

One Word or Two

Rulebase Summary

Many common words have both a one-word form and a two-word form with different meanings. The one-word form is typically an adverb or adjective, while the two-word form has each word serving its own grammatical function. The correct choice depends on the part of speech, definition, and context. Some forms are always wrong — for example, 'alot' and 'alright' are never correct. When a preposition follows, the two-word form is usually required.

BGGP OneWord.1 · p.429 BGGP OneWord.2 · p.429 BGGP OneWord.3 · p.430 BGGP OneWord.4 · p.430 BGGP OneWord.5 · p.430 BGGP OneWord.6 · p.430 BGGP OneWord.8 · p.431 BGGP OneWord.11 · p.431 BGGP OneWord.12 · p.432 BGGP OneWord.14 · p.432 BGGP OneWord.15 · p.432 BGGP OneWord.18 · p.434 BGGP OneWord.23 · p.435 BGGP OneWord.30 · p.437 BGGP OneWord.35 · p.438 BGGP OneWord.36 · p.438 BGGP OneWord.38 · p.439

Examples

A. I see him everyday at the office.

A. I see him every day at the office.

'Every day' = each individual day (two words). 'Everyday' = ordinary/routine (adjective before a noun).

A. She said it was alright to proceed.

A. She said it was all right to proceed.

'Alright' is never correct. Always use 'all right.'

A. I have not seen him for awhile.

A. I have not seen him for a while.

After a preposition ('for'), always use two words: 'a while.'

Transcript Notes

The general principle: the one-word form is usually an adverb or adjective modifying the sentence as a whole. The two-word form usually has each word serving its own grammatical function — an adjective modifying a noun, or a pronoun with a separate modifier. When in doubt, ask: can I separate the words and have each one work independently in the sentence? If yes, use two words.

Style Guide References (17)

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See also (2)