Cool MateAre you sure vs Do you really think
When to use each in English, with meaning, register, and examples.
Are you sure
Top 1,000 (very common)
Do you really think
Top 2,000 (common)
Most common: Are you sure
| Are you sure | Do you really think | |
|---|---|---|
| Pronunciation | 🇬🇧 //ɑːr jʊ ʃʊər//🇺🇸 //ɑr jʊ ʃʊr// | 🇬🇧 //dʊ jʊ ˈrɪəli θɪŋk//🇺🇸 //du jə ˈrɪli θɪŋk// |
| Meaning | Do you really know if this is correct? | Are you serious about your opinion? |
| Example | Are you sure you locked the door? | Do you really think this plan will work? |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 2,000 (common) |
| Collocations | are you sure about, are you sure that, are you sure of | do you really think, do you really believe, do you truly think |
| Antonyms | Are you uncertain, Are you doubtful, Are you unsure | Are you sure that, Don't you believe, Do you doubt, Are you certain |
| Common mistakes | Omitting 'you' and asking just 'sure?', Using a tone that sounds sarcastic., Confusing this with 'Are you certain?' which is more formal. | Omitting 'do' in questions (e.g., 'you really think')., Confusing with 'do you actually think'., 'Really' is sometimes misspelled as 'real' in informal writing. |
| Usage notes | Use when asking someone to confirm their belief. Appropriate in any setting, but avoid if it's too informal for the situation. | Used for expressing skepticism or surprise. Often followed by a clarification or objection. This phrase could be too informal for official settings. |
Frequently asked questions: Are you sure vs Do you really think
What's the difference between Are you sure and Do you really think?
Are you sure: Do you really know if this is correct? Do you really think: Are you serious about your opinion?
Which is more common: Are you sure and Do you really think?
Are you sure is the most common in everyday English.
Can you show an example of each?
Are you sure: Are you sure you locked the door? Do you really think: Do you really think this plan will work?
Can I use Are you sure and Do you really think interchangeably?
Not always. Are you sure and Do you really think are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.