Sentence examples for i sure from inspiring English sources

The phrase "I sure" is not a complete sentence, and it would not be considered grammatically correct in written English.
It could potentially be used in informal spoken language as an exclamation or an expression of agreement or certainty, but it is not typically used in formal writing. Example: "I sure could use a cup of coffee right now!" This sentence is not incorrect, but it would be more grammatically correct to say, "I sure could use a cup of coffee at the moment!".