Dust has gathered on a sheet of glass Dust has been gathering on a sheet of glass Dust is singular - it's a single experience to a person - so it's 'has' It's 'gathered' not 'been gathered' 'gathered' = come together ('the people gathered in the street') 'been gathered' needs to be by something ('the apples have been gathered' ie by people) d
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.