let's don't (let's not)

Writers sometimes say "let's don't" in speech, but it's nonstandard. The clash is simple: let's = "let us" (a first-person plural suggestion) while don't is the negative auxiliary that pairs with do. Use "let's not" or a clear rewrite instead.

Quick answer

Don't use "let's don't." Use "let's not + base verb" (Let's not go), or rewrite with "we shouldn't," "let us not," or "don't + verb" depending on tone.

"Let's don't" mixes two different negation patterns; it's not accepted in standard English.
Safe replacements: "Let's not + verb," "We shouldn't + verb," or "Don't + verb" (as a command to others).
In formal writing prefer "we should not" or "let us not" for clarity and tone.

Core explanation: why "let's don't" is ungrammatical

"Let's" is a hortative (let us) that takes the bare infinitive. Negation attaches to let: "Let's not + verb." "Don't" requires do-support and a separate subject (I don't, you don't), so you can't put it after "let's."

Correct: Let's not + base verb (Let's not argue).
Incorrect: Let's don't + base verb (Let's don't argue).
Alternative correct forms: We shouldn't + verb; Let us not + verb; Don't + verb (as an instruction).

Wrong: Let's don't argue about this in front of the client.
Right: Let's not argue about this in front of the client.
Wrong: Let's don't bring snacks into the lab.
Right: Let's not bring snacks into the lab.

Real usage and tone

Native speakers use "let's not" casually and will rarely, if ever, say "let's don't" in standard dialects. In professional or academic contexts avoid contractions when formality matters.

Casual: Let's not / Maybe we shouldn't.
Work: We shouldn't / Let us not / It's better if we don't.
School: Use "let's not" in speech; "we should not" or passive phrasing for essays.

Casual: "Let's not stay out too late tonight."
Work: "Let's not mention the budget until after the meeting."
Formal: "We should not release the report without legal review."

Rewrite help: three reliable fixes

When you spot "let's don't," follow three steps: decide if you're making a group suggestion (use "Let's not"), choose a formal option ("We should not"), or give an instruction to others ("Don't + verb").

Pattern A - Suggestion: Let's not + base verb (Let's not stay late).
Pattern B - Formal: We should not + base verb (We should not submit yet).
Pattern C - Instruction: Don't + base verb (Don't forget to attach the file).

Rewrite:
Wrong: Let's don't publish this without approval. → Let's not publish this without approval.
Rewrite:
Wrong: Let's don't add this question to the exam. → We shouldn't add this question to the exam.
Rewrite:
Wrong: Let's don't tell them the surprise yet. → Don't tell them the surprise yet. (if addressing a specific person or group)

Examples: work, school, and casual sentences with corrections

Each pair shows the common mistaken form and a corrected alternative. Use the work examples for emails and meetings, school examples for essays and projects, and casual examples for texts and conversations.

Work - Wrong: Let's don't put the client on hold while we check the files.
Work - Right: Let's not put the client on hold while we check the files.
Work - Wrong: Let's don't mention the finance numbers until next week.
Work - Right: We shouldn't mention the finance numbers until next week.
Work - Wrong: Let's don't start the presentation without the updated slides.
Work - Right: Let's not start the presentation without the updated slides.
School - Wrong: Let's don't copy this paragraph into our report.
School - Right: We shouldn't copy this paragraph into our report; it's too close to the source.
School - Wrong: Let's don't include that experiment in the final draft.
School - Right: Let's not include that experiment in the final draft.
School - Wrong: Let's don't hand the homework in late.
School - Right: Don't hand the homework in late.
Casual - Wrong: Let's don't go to the party tonight.
Casual - Right: Let's not go to the party tonight.
Casual - Wrong: Let's don't text him back right now.
Casual - Right: Don't text him back right now.
Casual - Wrong: Let's don't tell Sarah about the plan.
Casual - Right: Let's not tell Sarah about the plan.

Try your own sentence

Test the whole sentence rather than the phrase alone. Swapping in "we should not" or "let's not" in your head usually reveals the correct tone and structure.

Memory trick: a quick way to remember the correct form

Think "Let's = let us" and let "not" stick to let. Don't belongs with do. A short line helps: "Let us, not do us." Odd-sounding, but it cues the right pairing.

Mnemonic: Let us + not → Let's not.
Remember: don't pairs with do/does/did, not with let's.
If in doubt, mentally replace the phrase with "we should not"; if that preserves meaning, use it.

Similar mistakes and how to spot them

Confusion often comes from missing or misplaced apostrophes and from mixing "don't let" (a warning) with "let's not" (a shared suggestion).

lets (no apostrophe) = allows (He lets the dog out).
let's (with apostrophe) = let us (Let's eat).
Don't let = don't allow someone to do something (Don't let him drive).
Let us not = formal alternative, less common in speech.

Wrong: Lets not forget to submit the form.
Right: Let's not forget to submit the form.
Wrong: Don't let's start without him.
Right: Let's not start without him.

Apostrophes and spacing: common typing mistakes to watch for

Contractions need a single apostrophe and no space: correct = let's. Common typos are lets (missing apostrophe) or let 's (space before the apostrophe). Both are incorrect when you mean "let us."

Correct: let's → contraction for let us.
Incorrect: lets → third-person singular of let.
Incorrect: let 's or other spacing errors - keep the contraction together.

Wrong: Lets don't leave yet.
Right: Let's not leave yet.
Wrong: Let 's not get distracted.
Right: Let's not get distracted.

Grammar deep dive: hortatives and negation

Let's behaves like an imperative proposing joint action: Let's + bare infinitive. Negation attaches directly to let (Let's not + verb). Do-support (don't) operates in a different syntactic slot and can't attach after let's.

Hortative: Let's + bare infinitive (Let's try).
Hortative negative: Let's not + bare infinitive (Let's not try).
Do-support negative: Subject + don't/doesn't/didn't + verb (You don't try; He doesn't try).

Wrong: Let's don't be late.
Right: Let's not be late.

FAQ

Is "let's don't" correct English?

No. "Let's don't" is nonstandard. Use "Let's not" or a rewrite such as "We shouldn't" or "Don't" depending on tone and audience.

Can native speakers say "lets don't" in casual speech?

Some regional or nonstandard speech patterns might produce similar sounds, but it's not accepted in standard English and should be avoided in writing and formal speech.

What's the difference between "let's not" and "don't"?

"Let's not" suggests a joint decision (first-person plural). "Don't" is a direct instruction or negative statement aimed at someone (second- or third-person with do-support).

Should I write "let us not" in formal writing?

"Let us not" is grammatical and more formal than "let's not," but "we should not" or "we must not" often reads more naturally in formal prose.

How do I fix a sentence if I'm unsure which rewrite to use?

Replace the phrase with "we should not" to test tone. If that preserves your meaning, use it. Otherwise choose "Let's not" for casual group suggestions or "Don't" for instructions to others.

Check one sentence now

Paste a sentence into the widget above to try a rewrite. Swapping "let's don't" for "let's not" or "we shouldn't" usually fixes the problem and clarifies tone.