一個表示狀態，一個表示動作。

wake up：英 [weik 宲] 美 [wek 宲] 醒來；活躍起來；引起注意；（使）認識到

舉例：

A cool shower wakes up the body and boosts circulation.

冷水澡可以刺激身體，促進血液迴圈。

I nearly always wake up fresh and rested.

我幾乎每天醒來都精神抖擻，得到了充分休息。

You have to wake up now, baby.

該起床了，寶貝兒。

She set the alarm so she"d wake up in time to give her two sons theirmedication.

她定了鬧鐘，以便及時醒來給兩個兒子服藥。

get up：英 [ɡet 宲] 美 [ɡ[t 宲] 站起來；（使）起床；安排；舉起

舉例：

I got up and walked over to where he was.

我起身走到他那邊。

They have to get up early in the morning.

他們大清早就得起床。

They knew how to get themselves up in those days.

那時候，他們懂得打扮。

He"s much better and can get up now.

他好多了，能下床了。