v.
1) ( D ; intr. ) ('to attend') to ~ as (she sat in as our representative)
2) ( D ; intr. ) to ~ for ('to replace') (she sat in for me while I was out of town)
3) ( D ; intr. ) to ~ on ('to attend') (we sat in on a few meetings)
v.
1) ( D ; intr. ) ('to attend') to ~ as (she sat in as our representative)
2) ( D ; intr. ) to ~ for ('to replace') (she sat in for me while I was out of town)
3) ( D ; intr. ) to ~ on ('to attend') (we sat in on a few meetings)
The Bbi combinatory dictionary of English, a guide to word combinations. Комбинаторный словарь английского языка Bbi. Руководство по словосочетаниям. 2012