sit in on

B2 neutral inseparable transitive

In simple words

to be there and watch without really joining in

Literal meaning: to sit inside while something is happening

Meanings

1 B2 idiomatic neutral

common

to attend a class, meeting, or activity in order to observe it rather than fully participate

"The new manager sat in on the training session to see how it worked."

"I sat in on the meetings."
— Various memoir/interview contexts; exact famous source not recalled

Grammar: inseparable

Usage notes

Often used with classes, meetings, interviews, and rehearsals. Usually implies permission or temporary attendance.

class meeting lesson interview rehearsal session

Base

sit in on

I/you/we/they

3rd person

sits in on

he/she/it

Past simple

sat in on

yesterday

Past participle

sat in on

have + pp

-ing form

sitting in on

continuous

Try:

Video examples are being collected. Check back soon.

observe attend as an observer watch audit be present at

Want to master this phrasal verb?