sit up

• 动词短语，指从躺卧或弯腰的姿势转为坐直，也指突然警觉或注意起来。

A phrasal verb used to indicate the act of moving from a lying or slouching position to an upright sitting position, or to suddenly become alert or attentive.

不可数 · 不及物 · 短语动词，不带宾语

1. Move to an upright positionformal

   To change from a lying or slouching position to a sitting position.

   坐起来

   • He sat up in bed when he heard the noise.
   • The baby is learning to sit up on her own.
   • She sat up slowly after lying down for a nap.

   反义词lie downreclineslouchsprawl

2. Stay awake lateinformal

   To remain awake and not go to bed, often waiting for something.

   熬夜等待

   • We sat up late watching movies.
   • She sat up waiting for her son to come home.
   • I sat up all night to finish the report.

   同义词stay up

   反义词retiresleep

3. Become alert or attentiveinformal

   To suddenly become more alert or pay closer attention.

   警觉起来

   • The news made everyone sit up and take notice.
   • His speech made the audience sit up and listen.
   • The sudden noise made the dog sit up and bark.

   同义词alertbrightenperk uprousetake noticewake up

基本动词sit