For the past few years, he'd worked mainly during the day.
She works mainly on television, but also, since 2007, in film.
He works mainly on executive government and the politics of public services.
The two worked mainly on White's legs, and those are fine.
He worked mainly on English films from 1964 to 1974.
He works mainly on the French literature of the 17th century.
Until that point, she was mainly working with private clients.
From 1970 to 1974 I worked mainly on black holes.
We had a gang of men on the road, working mainly by night.
In this function, he worked mainly on education and justice.