of course not

"你介意我借用你的钢笔吗？" "当然不介意。"

"Do you mind if I borrow your pen?" "___Of ___course ___not."

"你介意解释一下那个吗，请问？" "当然不介意！"

"Would you mind explaining that, please?" "___Of ___course ___not!"

"我可以现在拆你的礼物吗？""当然不行！"

"Can I open your gift now?" "___Of ___course ___not!"