A coworker asked if you would help her put together a presentation. You would like to help her because it seems like an interesting project. You want to agree and sound enthusiastic. You say:
Sure, I'd be glad to.
"Sure" means "yes". But it's more casual. Just answering "yes" to a question can sound as if you are angry.
"Sure" also has some of the meaning of "of course" - meaning that it's obvious and expected for the answer to be "yes". But "of course" is a stronger response than "sure".
When you want to cheerfully accept someone's request, you can say "I'd be glad to."
You can also follow "I'd be glad to" with a phrase describing the action that you'd be glad to do. For example, you can say:
I'd be glad to help you with that.
I'd be glad to teach you how to do it, if you're interested.
This is a good way to volunteer to do something. It sounds friendly and helpful.
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