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Moon7296 Posted 11 years ago
Vocabulary

sit it/ sit it on

1. Tell some students to sit in the classroom
2. I agree. I also think Dave should sit in on the interview. I'll find out when he's available.
3. Tell some students to sit in on class.

Q) I found the example #1 and #2 on the net. I was wondering when you put the preposition on with the expression "sit in." Is #3 natural about the use of "on?"
  

Top answer

1. Tell some students [to sit] [in the classroom], and tell some [to sit] [in the hallway]. ) 2.

  • 1.
  • Tell some students [to sit] [in the classroom], and tell some [to sit] [in the hallway].
  • ) 2.
  • I also think Dave should [sit in] [on the interview].
  • (should be present and observe at the interview) 3.
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2 Answers
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1. Tell some students [to sit] [in the classroom], and tell some [to sit] [in the hallway]. (Literal sitting.)
2. I also think Dave should [sit in] [on the interview]. (should be present and observe at the interview)
3. Tell some students [to sit in] [on the class]. (to be present and observe when class is in session; either once or for the entire semester)
moon7296
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"sit in on" is used with objects like "interview", "discussion", "meeting" etc.

"sit in on class" is possible, but it suggests something different from attending class in the normal way -- some kind of observational role, for instance.

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