Of course i do vs Sure

When to use each in English, with meaning, register, and examples.

Of course i do

Top 5,000 (fairly common)

Sure

Top 1,000 (very common)A1adjective
Most common: Sure
 Of course i doSure
Pronunciation🇬🇧 //əv kɔːs aɪ du//🇺🇸 //əv kɔrs aɪ du//🇬🇧 /["/ʃʊə(r)//ʃɔː(r)/"]/🇺🇸 /["/ʃʊr/"]/
MeaningYes, definitely.certain or confident about something
ExampleDo you love ice cream? Of course I do!I am sure that we will win the game.
RegisterNeutralNeutral
How commonTop 5,000 (fairly common)Top 1,000 (very common)
CEFR level-A1
Part of speechadjective
CollocationsOf course I agree, Of course not, Of course you canbe, feel, seem, absolutely, completely, quite, about, of, be, feel, seem, absolutely, completely, quite, about, of
Antonyms-uncertain, doubtful, unsure
Common mistakesMisuse with sarcasm when agreement is not intended., Omitting 'of' and saying 'course I do'., Using it in negative contexts.Used too casually in formal situations., Confused with 'surely' which implies a stronger confirmation., Mispronounced as 'sher' instead of 'shur'.
Usage notesUsed to affirm or agree emphatically. Appropriate in both casual and formal contexts.Used to express agreement or assurance. It's typically appropriate in most casual and formal contexts, but can feel dismissive if overused in a conversation.

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Sure

Frequently asked questions: Of course i do vs Sure

What's the difference between Of course i do and Sure?

Of course i do: Yes, definitely. Sure: certain or confident about something

Which is more common: Of course i do and Sure?

Sure is the most common in everyday English.

Can you show an example of each?

Of course i do: Do you love ice cream? Of course I do! Sure: I am sure that we will win the game.

Can I use Of course i do and Sure interchangeably?

Not always. Of course i do and Sure 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.

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