If you sit in on a lesson, meeting, or discussion, you are present while it is taking place but do not take part in it.
Will they permit you to sit in on a few classes?...
PHRASAL VERB : V P P n
If you sit in on a lesson, meeting, or discussion, you are present while it is taking place but do not take part in it.
Will they permit you to sit in on a few classes?...
PHRASAL VERB : V P P n
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006