'to sit around' means to spend time doing very little.
- They just sit around and do nothing all day.
- We sat around in the hotel until it stopped raining.
'to sit back' means to wait for something to happen while deliberately not being involved.
- She just sat back and waited for us to do everything.
- You can't just sit back and expect me to do everything.
'to sit down' means to lower your body into a sitting position.
- We looked for somewhere to sit down.
- She sat down beside me on the sofa and started talking.
'to sit in on' something means to be present during a meeting or event but not participate.
- He asked me to sit in on the discussion and report back to him.
- When I was new to the department, I sat in on meetings to learn the procedures.
'to sit on' a committee or panel means to be a member.
- As the representative of the personnel, I sat on the board of directors.
- He sat on many committees dealing with education.
'to sit out' means to be outside rather than inside.
- While the weather was good, we sat out and had lunch.
- We went to the pub and sat out at the tables in the garden.
'to sit out' something means to wait for it to finish.
- His injury meant that he had to sit out the rest of the competition.
- When it started raining, we decided to sit out the storm in the café.
'to sit over' someone is to watch them very carefully to check up on them.
- I sat over him and made sure he took his medicine.
- She sat over me until I had finished everything.
'to sit through' means to remain until something is finished, especially if it is unpleasant.
- They sat through a very long meeting.
- We had to sit through a very boring lecture before we could go for a drink.
'to sit up' means to not go to bed until it very late.
- I sat up and waited for him to come home.
- She sat up all night to finish her project before the deadline.