sit in

• 动词短语，表示作为参与者或旁听者出席（会议、课程或活动），通常不承担主要发言或主动角色。也可指临时替人照看孩子或短时间代理某人的工作。

A phrasal verb used to indicate attending a meeting, class, or event as a participant or observer, often without taking an active role.

不可数 · 不及物 · 短语动词，不可分

1. Attend as an observerformal

   To attend a meeting, class, or event without actively participating.

   旁听

   • She sat in on the lecture to learn more about the topic.
   • The manager allowed the intern to sit in on the board meeting.
   • He sat in on the rehearsal to see how the play was progressing.

   同义词attendauditlook onobserve

2. Substitute or take a placeinformal

   To temporarily take someone's place in a group or activity.

   替代

   • I need someone to sit in for me at the meeting tomorrow.
   • She sat in for the regular drummer during the concert.
   • He sat in as the moderator when the host fell ill.

   同义词coverdeputizefill inrelievestand insubstitute

基本动词sit