新概念英语2册54课问题 The doorbell rang loud enough to wake the dead.

题目

新概念英语2册54课问题 The doorbell rang loud enough to wake the dead.
有一句话是：The doorbell rang loud enough to wake the dead.
能否改成：The doorbell rang loud enough to wake up the dead.
请问为什么?

答案

　　在表示“唤醒,使醒来”之意时,可以互换.参见《当代朗文英语词典》.
　　wake also wake up:to stop sleeping ,or to make someone stop sleeping.
I'll wake you up when it's time to leave.(= I'll wake you when it's time to leave.)