Of course , Sure
They both could be used interchangeably in many cases to give permission in a polite way for example:
"Can I use your cellphone ?"
"Of course, you can."
"Sure, you can."
You can use both.
'Of course' means it is a normal thing ,it goes without saying .It emphasizes someone's agreement "of course" or disagreement " of course not".
'Sure' means it is definite, certain and free from doubt. It emphasizes that something (using the phone here) is reliable. It is also many times just an informal way of saying 'yes' or 'all right' .
Of course is used say that something is obvious. Is Bill Gates rich? Of course he is. Does a bear shit in the woods? Of course.
For sure means definitely, or without any doubt (undoubtedly). You could certainly say "for sure" as a response to that question too. "Are you going to the party?" For sure. Without any doubt
As the world becomes additional world and integrated community, English language plays a vital role in connecting people and their ideas to at least one another. www.engforu.com is created by Maung Maung One. My goal is, the people of Myanmar who need to develop English Language must be supported as much as I can. Its purpose was to help expand learner access to the Basic English. I would like to give our special thanks to BBC, VOA for graciously allowing us to use their news stories as a basis of our learning activities. Their stories, photos and videos have made learning interesting and appropriate for adults.