床是每个人休息的地方，但是每个人休息的地方不一定都是床，就像短语 go to seep 所描述的那样，它只表明某人去睡觉，但没有指明睡觉的地方，但是当 get up 用来表示”起床“的时候，确实是从床上起来的。
I shut my eyes and tried to go to sleep.He woke for a moment and then went to sleep again.
Up 是常见的小品词，常用于构成短语动词来改变动词的意思，其中短语动词 get up 的意思丰富，它也可以用来表示”起床“，相当于 get out of bed，例如：I don't know why I got up so early this morning. Believe me, I didn't set my alarm for 6 AM!我不知道今天早上为什么起得这么早。相信我，我没把闹钟定在早上6点！Could you get me up at 6.30 tomorrow?I've got to get John up, or he will be late for work.She forced herself to get out of bed.
除了 get up 之外，”起床“还可以用一个高级且简单的短语 up and about 来表示，含有起床后感觉良好并活动起来的意思，就是有两个动作，一是起来，二是活动开来，相当于 up and around 或 up and doing，例如：It took her a month after the accident before she was really up and about.I hurt my back during tennis practise yesterday. The doctor has given me some pain pills and I will be up and about in no time.昨天我在练习网球时伤了背。医生给了我一些止痛药，我很快就会起床走动了。The surgery went very well, and the doctor is optimistic that she'll be up and about soon.We're all thrilled to be up and about after seven hours on a bus!
其实短语动词 get up 意思丰富多彩，除了”起床“的意思之外，还有其他很多的用法，例如：1. get up 意为”站起，起身“，相当于 stand 和 riseThe class got up when the teacher came in.I got up from the chair and turned the light on.Everyone stood when the President came in.They rose from the table.We're getting up a party for her birthday.The temperature got up to 100 degrees.4. get up to 意为”忙于，从事“，尤指令人吃惊或不快的事What have you and Janet been getting up to since I last saw you?
注意：很多短语动词都有对应的名词形式，而且名词的意思跟短语动词的意思相近，有的形式比较特殊，例如 blackout 是从短语动词 black out 演变过来的，break-in 是从 break in 过来的。
但是 get up 对应的名词形式是老式的 get-up [ˈɡet ʌp] 的意思发生很大变化，它意为”一套衣服，穿戴，装束“，复数形式是 get-ups，用于非正式的场合中，例如：
Naturally he couldn't work in this get-up.
他当然不能穿这么滑稽的衣服上班。
I didn't care very much for her get-up.
thrilled [θrɪld] 意为”非常幸福，极为激动“
