Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
sure you do
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'sure you do' is correct and usable in written English.
This phrase can be used to express agreement or understanding with someone, or to answer in the affirmative to a question. For example: Sally: "Do you like going for long walks?" John: "Sure I do."
✓ Grammatically correct
News & Media
Academia
Wiki
Alternative expressions(6)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
"I'm sure you do".
News & Media
Sure you do.
News & Media
"Say, sure you do".
News & Media
I am sure you do.
News & Media
I'm sure you do too.
News & Media
"Sure you do," Hubby said.
News & Media
ROMNEY MINION: Sure you do.
News & Media
"Sure you do," he said.
News & Media
"Sure you do," Alex whispered.
News & Media
"I'm sure you do," Sinkler said.
News & Media
"I'm sure you do," Marco says.
News & Media
Expert writing Tips
Best practice
Use "sure you do" sparingly to maintain its impact and avoid overuse, which can diminish its effectiveness.
Common error
Be mindful of your audience; using "sure you do" in formal settings or with individuals who may not understand sarcasm can lead to misunderstandings or offense.
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "sure you do" primarily functions as an interjection or a short response used sarcastically. According to Ludwig, it expresses disbelief or skepticism towards a statement made by another person, implying that the speaker finds the statement dubious or untrue. It's often used to challenge or mock the other person's claim.
Frequent in
News & Media
60%
Wiki
24%
Academia
8%
Less common in
Formal & Business
0%
Science
8%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "sure you do" is a commonly used phrase expressing disbelief or skepticism, primarily in informal contexts. According to Ludwig, the phrase is grammatically correct and usable in written English. While it appears in news and media, its sarcastic tone makes it unsuitable for formal or professional communication. Related phrases offer similar expressions of doubt with varying degrees of formality and intensity. Understanding its nuanced usage is crucial to avoid misinterpretations, and being mindful of your audience when using this phrase is highly recommended.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Yeah right
More informal and sarcastic.
As if
Expresses strong disbelief; more concise.
I highly doubt that
Expresses stronger disbelief; more formal.
That's what you think
Challenges the other person's assumption; confrontational.
I don't believe you
Directly expresses disbelief; less subtle.
Not likely
Expresses a low probability of something happening.
Tell me another one
Implies the statement is untrue or far-fetched.
I find that hard to believe
A more polite way of expressing disbelief.
I'll believe it when I see it
Expresses skepticism requiring proof.
You wish
Implies something is desired but unlikely to happen.
FAQs
How to use "sure you do" in a sentence?
"Sure you do" is typically used as a sarcastic response to something someone says, implying disbelief or skepticism. For example, if someone claims to have cleaned the entire house in five minutes, you might respond with, "Sure you do."
What does "sure you do" imply?
The phrase "sure you do" implies that the speaker does not believe what the other person is saying, often with a tone of irony or sarcasm. It suggests the statement is either exaggerated or completely untrue.
What are some alternatives to "sure you do"?
Alternatives to "sure you do" include phrases like "yeah right", "as if", "I don't believe you", or "I highly doubt that", depending on the context and desired level of formality.
Is "sure you do" appropriate in formal communication?
No, "sure you do" is generally not appropriate in formal communication. It carries a sarcastic or dismissive tone, which can be considered unprofessional or impolite. Opt for more direct and respectful ways to express disagreement or skepticism in formal settings.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested