be vs but, What's the Difference?

Which to use

“be” is a verb and “but” is a preposition - they look or sound alike but fill different roles in a sentence.

#17
“be” frequency rank: #25
“but” frequency rank: 42
confusion score

Side-by-Side Comparison

Feature	be	but
Definition	As an auxiliary verb:	Apart from, except (for), excluding.

Where the eye mixes be and but

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch

3 ch

but

Why the eye confuses be with but

These two trip readers on the page rather than in the ear: be is /biː/ while but is /ˈbʌt/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 42, derived from the frequency rank of both members and their visual similarity.

be is recorded at frequency rank #17, classified as averb, pronounced /biː/. but is at rank #25, tagged as aprep, pronounced /ˈbʌt/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 42, this pair ranks #529,970 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of be vs but

Shared letters: b. Private to "be": e. Private to "but": tu.

"be" · 2 letters · shape CV · "but" · 3 letters · shape CVC

Frequently Asked Questions

Do "be" and "but" mean the same thing in a sentence?

No - they are not even the same part of speech. "be" is a verb and "but" a preposition, so a sentence built for one is usually ungrammatical with the other.

Frequency check: "be" vs "but" - which ranks higher?

"be" is the more common of the two: it sits at frequency rank #17 in our English list, against #25 for "but". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "be" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "but" - compare definitions side by side with the headword page. Word entry
This pair ranks #529,970 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"be" and "but" also get mixed up with nearby pairs, the highest-scored neighbour is "BFS vs but". Nearby pair

Confusion rank #529,970 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.