student asking question

Shouldn't she use "wake up" for this sentence?

teacher

Native speaker’s answer

Rebecca

"wake up" means to stop sleeping or end someone’s sleep, but Anna is trying to say that she has been awake for an hour. "be up" is a common expression that means to be awake. Ex: I've been up all night. Ex: You're up early.

Popular Q&As

03/29

Complete the expression with a quiz!