they don (don't)

If you typed "They Don," change it to "they don't" or "they do not." Missing or misplaced apostrophes and spacing cause this frequent error.

Below are clear rules, quick checks, many copy-paste sentences for work, school, and casual writing, plus fast rewrites you can use immediately.

Quick answer

Use don't (with an apostrophe) to contract do not. "They don" without an apostrophe is almost always a typo or spacing error.

"They don't" = they do not (correct contraction).
"They don" (no apostrophe) looks like a misspelling or the unrelated verb don (to put on).
When writing formally, prefer "they do not" for emphasis or tone.

Core explanation (why don't, not don)

Don't is the contraction of do + not: do + not → don't. The apostrophe replaces the missing o.

Without the apostrophe, "don" is either the verb don (to put on clothing) or simply incorrect for the negative.

"They don't know" = "They do not know."
Use don't with I/you/we/they. Use doesn't with he/she/it.
In formal writing, expand to do not: "They do not agree."

Correct: They don't have the files yet. (They do not have the files yet.)
Wrong: They don have the files yet.

Grammar checklist (quick rules)

When you spot "don" without an apostrophe, run this mini-check.

Is the subject I/you/we/they? Use don't for negatives (I don't, you don't, we don't, they don't).
For he/she/it use doesn't (he doesn't).
For formal tone or emphasis, write do not instead of don't.
Fix missing apostrophes: dont → don't; don t → don't.

Example (third person): Wrong: He don like coffee. →
Right: He doesn't like coffee.
Example (formal): Informal: They don't agree. Formal: They do not agree.

Hyphenation and spacing (apostrophe matters)

Don't is one word with an apostrophe. It is not hyphenated and it is not two words.

Correct: don't
Wrong: don t, don' t, dont
Also wrong: Capitalizing Don mid-sentence (Don) unless it's a name.

Spacing example: Wrong: They don t understand the policy. →
Right: They don't understand the policy.
Apostrophe example: Wrong: Dont do that. →
Right: Don't do that.

Why writers make this mistake

People often hear the contraction in speech and forget the apostrophe when typing. Fast typing, autocorrect, and non-native patterns also contribute.

Hearing the sound but not the spelling (sound-based guessing).
Typing quickly and skipping punctuation.
Mixing up don't and doesn't, or confusing don (verb) with don't (contraction).

Real usage: copy-paste sentences for work, school, and casual messages

Natural sentences you can copy or adapt. Each shows the proper contraction.

Work 1 Wrong: They don finish the deployment by Friday. →
Right: They don't finish the deployment by Friday.
Work 2 Wrong: They don have the report ready. →
Right: They don't have the report ready.
Work 3 Wrong: If they don approve, we delay the release. →
Right: If they don't approve, we delay the release.
School 1 Wrong: They don understand the assignment. →
Right: They don't understand the assignment.
School 2 Wrong: The students don submit the draft on time. →
Right: The students don't submit the draft on time.
School 3 Wrong: If they don revise, their grade will suffer. →
Right: If they don't revise, their grade will suffer.
Casual 1 Wrong: They don want to come to the party. →
Right: They don't want to come to the party.
Casual 2 Wrong: They don care about the outcome. →
Right: They don't care about the outcome.
Casual 3 Wrong: They don know the plan. →
Right: They don't know the plan.

Try your own sentence

Test the whole sentence rather than the phrase alone: expanding the contraction to "do not" often makes the meaning and grammar clear.

Wrong vs right pairs you can use immediately

Six compact wrong/right swaps across contexts. Replace the wrong line with the right one and you're done.

Pair 1 Wrong: They don agree with the budget. →
Right: They don't agree with the budget.
Pair 2 Wrong: They don submitted their forms. →
Right: They haven't submitted their forms. / They didn't submit their forms.
Pair 3 Wrong: They don accept late work. →
Right: They don't accept late work.
Pair 4 Wrong: They don plan to join the meeting. →
Right: They don't plan to join the meeting.
Pair 5 Wrong: They don finish before lunch. →
Right: They don't finish before lunch.
Pair 6 Wrong: They don think that's fair. →
Right: They don't think that's fair.

How to rewrite (fast fixes and natural variants)

Often replacing don → don't is enough. Sometimes a different verb or tense reads more naturally.

Direct fix: change don → don't or expand to do not.
If tense is wrong, pick an alternative: haven't, didn't, won't, are not meeting, failed to.
Keep tone consistent when reporting speech: match contractions to the level of formality.

Work rewrite: Original: They don meet the SLA. → Quick: They don't meet the SLA. → Natural: They are not meeting the SLA.
School rewrite: Original: They don hand in their homework. → Quick: They don't hand in their homework. → Natural: They haven't handed in their homework.
Casual rewrite: Original: They don want to go. → Quick: They don't want to go. → Natural: They probably won't go.
Question rewrite: Original: Do they don understand? →
Fixed: Don't they understand? →
Formal: Do they not understand?
Past tense rewrite: Original: They don sign the form yesterday. →
Correct: They didn't sign the form yesterday. →
Alternative: They failed to sign the form yesterday.
Future rewrite: Original: They don attend the session tomorrow. →
Correct: They won't attend the session tomorrow. →
Alternative: They are not scheduled to attend tomorrow.

A simple memory trick

Link the apostrophe to the missing o: do + not → d(o)'nt. Picture the o replaced by an apostrophe.

Apostrophe = missing letter (o).
If unsure, expand the contraction in your head: they do not → they don't.

Similar mistakes to watch for

After fixing don → don't, scan for other contraction and spacing errors that often appear together.

dont (no apostrophe) - common in informal text; fix to don't in formal writing.
doesnt - should be doesn't for he/she/it.
don (verb) - "to don" means to put on clothing; context will show whether it's correct.
do not vs don't - choose the level of formality and stay consistent.

Example: Wrong: She dont like it. →
Right: She doesn't like it.
Correct different meaning: He will don his coat before leaving.

FAQ

Is "They Don" ever acceptable?

Not for the negative. "Don" without an apostrophe is either a misspelling or the verb don (to put on). If you mean the negative, write "they don't" or "they do not."

Should I always use don't or sometimes do not?

Use don't in casual and many professional contexts. Use do not for emphasis or formal tone: "They do not agree."

How do I fix multiple instances fast?

Search for " don " (with spaces), "dont", "don t", or "Don" mid-sentence. Replace with don't or rephrase to do not as needed.

What about "doesn't"?

Use doesn't for singular third-person subjects (he/she/it). Example: "She doesn't like tea."

Can autocorrect cause this?

Yes. Autocorrect can remove an apostrophe or capitalize Don. Quickly scan contractions after spellcheck; context matters.

Quick editing habit

When you spot don without an apostrophe, expand it in your head to do not to confirm meaning, then fix to don't or rephrase. A fast sentence-level check before sending catches most slips.