canvscan'tWhat's the difference?

Quick tell: can is a verb, can't is an abbrev, so they fill different roles in a sentence.

Which to use

“can” is a verb and “can't” is an abbrev - they look or sound alike but fill different roles in a sentence.

#4,597
“can” frequency rank
#12,884
“can't” frequency rank
17481
confusion score

Side-by-Side Comparison

Feature can can't
Definition zeigt die Fähigkeit an, etwas tun zu können; können nicht können

Where the spellings diverge

Shared letters are muted; the letters that actually set can and can't apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.

3 ch
can
5 ch
can't

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: can is [kæn] while can't is [kɑːnt]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “can” sits inside “can't”, and the parts of speech differ too (verb vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 17481, derived from the frequency rank of both members and their visual similarity.

can is recorded at frequency rank #4,597, classified as averb, pronounced [kæn]. can't is at rank #12,884, tagged as anabbrev, pronounced [kɑːnt].

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 17481, this pair ranks #1,927,000 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of can vs can't

Shared letters: acn. Private to "can": -. Private to "can't": t.

"can" · 3 letters · shape CVC  ·  "can't" · 4 letters · shape CVCC

Frequently Asked Questions

Can "can" and "can't" be used interchangeably?
No - they are not even the same part of speech. "can" is a verb and "can't" an abbrev, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "can" or "can't"?
"can" is the more common of the two: it sits at frequency rank #4,597 in our German list, against #12,884 for "can't". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list