"我能借用你的笔吗？" - "当然，拿去吧。"

"Can I borrow your pen?" - "Yes, ___go ___ahead."

"我能吃块蛋糕吗？" - "当然可以，吃吧，只是别吃太多。"

"Can I have a piece of cake?" - "Sure, ___go ___ahead, just don't have too much."

"我今天能早点下班吗？" - "去吧，你的工作已经完成了。"

"May I leave work a bit early today?" - "___Go ___ahead, your work is done."