sit in for
B2 neutral inseparable transitive
In simple words
to do someone else's job for a short time
Literal meaning: to sit in place of someone
Meanings
1 B2
idiomatic
neutral
to take someone's place for a short time in a job, performance, or activity
"Can you sit in for me at the meeting tomorrow morning?"
"Guest hosts will sit in for the presenter during her summer break."
— Broadcast scheduling language; exact source not recalled
Grammar: inseparable
Usage notes
Common in media, music, and work situations, though 'fill in for' is often more frequent in everyday English.
Commonly used with
host teacher presenter drummer manager colleague
Forms
Base
sit in for
I/you/we/they
3rd person
sits in for
he/she/it
Past simple
sat in for
yesterday
Past participle
sat in for
have + pp
-ing form
sitting in for
continuous
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