(4) 二十日，晓钟初动，即闻江口唤渡声。余惊起，呼曹同济。曹曰：“勿急。宜饱食登舟。”

　　On the twentieth, as soon as the morning temple bell had struck, I already heard the ferry-man crying at the bank for passengers to come aboard. I got up in a hurry and asked Ts'ao to go together. "No hurry. We must eat something before going down to the boat," said Ts'ao.

　　(沈复《浮生六记》，林语堂译)

　　该例中的祈使句“勿急”可作多种处理，如There's no hurry about it、Don't be in such a hurry、No need to hurry，但都不及本译文No hurry来得干脆简洁。这其中，There's no hurry about it和No hurry都不是祈使句，但具备相同的“呼唤”(vocative)这一交际功能。