do you what (do you know what)

"Do you what?" is a common fragment: the auxiliary "do you" needs a main verb (know, mean, say, see, remember, etc.) or a full content clause. Without that verb the sentence is unclear or incomplete.

Below: a compact answer, the grammatical rule, useful verbs and safe rewrites, many realistic wrong/right pairs for work, school and casual speech, a quick diagnostic checklist, a memory trick, and a short FAQ.

Quick answer

"Do you what?" is incomplete. Insert a verb (know, mean, say, see, remember, etc.) or rephrase. Common correct forms: "Do you know what...?", "Do you mean that...?", "Do you remember what...?"

Direct fix: insert the appropriate verb after "Do you" (know/mean/say/see/remember).
If you can't pick a verb, use a neutral rewrite: "Can you tell me what...?" or "Could you explain what...?"
Fragments are common in speech but confusing in writing-use the full form for clarity in emails, reports, and academic work.

Core explanation (grammar)

The fragment "Do you what?" leaves out the main verb that connects the auxiliary and subject to the content clause. English requires a matrix verb or a complete embedded clause: Do you + [main verb] + [content clause].

Correct patterns: Do you know what time it is? / Do you mean that we should leave? / Do you remember where we parked?
Required structure: [Auxiliary] + [Subject] + [Main verb] + [Wh-clause or infinitive]. Missing the main verb → fragment.

Common verbs and how they change meaning

Pick the verb based on the question's purpose: factual info, intent, comprehension, recall, or ability.

know - factual information: Do you know what the code is?
mean / say - checks intent or reported speech: Do you mean that we should cancel?
see / understand - checks comprehension: Do you see what I mean?
remember - checks recall: Do you remember what chapter to read?
can / could - asks ability or requests information politely: Can you tell me what to bring?

Examples: Do you know what time the meeting starts? / Do you mean the deadline moved to Friday? / Do you remember what the professor said?

Real usage and tone: when fragments happen and when they fail

Speakers often trail off in conversation, which produces fragments that work with supporting tone, gesture or immediate context. In writing or formal speech, those fragments create confusion.

Casual spoken: "Do you-? Oh, never mind." (acceptable because context fills the gap)
Written/professional: always provide the verb and clause for clarity.
Intentional fragments can show interruption, hesitation, or emotion, but must be used deliberately.

Rewrite help: short formulas and safe rewrites

Three quick formulas and three neutral rewrites to use when you're unsure which verb fits.

Formula A - Information: "Do you know what + [clause]?" → Do you know what time the train arrives?
Formula B - Intent/quote: "Do you mean (that) + [clause]?" → Do you mean that the meeting is canceled?
Formula C - Comprehension: "Do you see/understand what/how + [clause]?" → Do you understand what the instructions require?
Safe rewrites: "Can you tell me what + [clause]?", "Could you explain what + [clause]?", "Do you have any idea what + [clause]?"

Do you what I should bring? → Can you tell me what I should bring?
Do you what he wants? → Could you ask him what he wants? / Do you know what he wants?
Do you what I mean? → Do you see what I mean?

Try your own sentence

Test the whole sentence instead of the fragment. Context usually makes the correct verb obvious.

Examples: realistic wrong/right pairs (work, school, casual)

Each wrong sentence below is the fragment; the right sentence shows the appropriate verb or a neutral rewrite. Notice why a particular verb fits.

Work - Wrong: Do you what the client wants? -
Right: Do you know what the client wants?
Work - Wrong: Do you what to include in the report? -
Right: Do you know what to include in the report?
Work - Wrong: Do you what she said about the deadline? -
Right: Do you remember what she said about the deadline?
School - Wrong: Do you what the teacher assigned for homework? -
Right: Do you know what the teacher assigned for homework?
School - Wrong: Do you what the formula stands for? -
Right: Do you mean what the formula stands for?
School - Wrong: Do you what the professor expects in the essay? -
Right: Do you understand what the professor expects in the essay?
Casual - Wrong: Do you what she wants for her birthday? -
Right: Do you know what she wants for her birthday?
Casual - Wrong: Do you what I said earlier? -
Right: Do you remember what I said earlier?
Casual - Wrong: Do you what I mean? -
Right: Do you see what I mean?
Mixed - Wrong: Do you what needs to be fixed before launch? -
Right: Could you tell me what needs to be fixed before launch?
Mixed - Wrong: Do you what time the lecture ends? -
Right: Do you know what time the lecture ends?

Fix your own sentence: a short diagnostic checklist

Run this quick checklist whenever you spot "Do you what...".

1) Identify intent: information / intent / comprehension / recall / ability?
2) Choose the verb: know (info) • mean/say (intent) • see/understand (comprehension) • remember (recall) • can/could (ability/request).
3) If unsure, use a neutral rewrite: "Can you tell me what...?" or "Could you explain what...?"

Diagnostic examples: "Do you what happened?" → intent: information → fix: "Do you know what happened?"
"Do you what I want you to do?" → intent: recall/clarity → fix: "Do you remember what I want you to do?"

Memory trick and quick rules

Mnemonic: K-M-R-S = Know, Mean, Remember, See (or Say). When you hear "Do you what?", run K-M-R-S and pick the verb that fits the purpose.

One-line rules: use "know" for facts, "mean/say" for intent or reported speech, "see/understand" for comprehension, "remember" for recall. Use neutral rewrites when uncertain.
If you're writing: always use the full form; fragments are ambiguous on the page.

Similar mistakes, punctuation, spacing, and hyphenation notes

Related problems include missing auxiliary ("You what?") or the wrong auxiliary/tense ("Did you what?"). Changing punctuation, spacing or adding hyphens won't fix a missing verb.

"You what?" → usually needs rephrasing: "What did you say?" or "You said what?" depending on emphasis.
"Did you what?" → likely missing a main verb or the correct auxiliary: "Did you do what I asked?" or "Did you understand what I asked?"
Hyphenation/spacing: never write "Do-you-what" or "Do-you-know" to fix grammar-add the verb instead.

FAQ

Is "Do you what" grammatically correct?

No. It's a fragment because it omits the main verb that links "do you" to the content clause. Add a verb like "know", "mean", "see", or "remember" (e.g., "Do you know what I mean?").

Can I ever use "Do you what" in speech?

You might hear clipped fragments in casual spoken English; they rely on context and tone. For clear communication-especially in writing and professional speech-use the full verb form.

How do I choose between "Do you know what..." and "Do you mean..."?

"Do you know what..." asks for factual information. "Do you mean..." checks intent or clarifies what someone just said. Pick the verb that matches whether you want facts (know) or clarification of meaning (mean).

What's a quick neutral rewrite if I can't decide on a verb?

Use "Can you tell me what...?", "Could you explain what...?", or "Do you have any idea what...?" These work well in work and academic contexts and avoid choosing the wrong verb.

Will grammar checkers fix "Do you what?" automatically?

Many grammar tools will flag the fragment and suggest inserting a verb or offering neutral rewrites. Still, understanding which verb fits helps you choose the most natural correction.

Need a quick check?

Paste your sentence into a grammar checker to see suggested verbs and rewrites, or use the simple formula: identify intent → pick Know/Mean/Remember/See → add the clause, or use a neutral rewrite like "Can you tell me what...?".