Active to Passive
Professor James gives the students homework at the end of the class.
The students are given homework by Professor James at the end of the class.
The first Harry Potter book _______ on an old manual typewriter. (write)
The first Harry Potter book was written on an old manual typewriter.
It is thought that knowledge of geometry had been advanced by the ancient Egyptians. a. People think that the ancient Egyptians had some knowledge of advanced geometry. b. People think that the ancient Egyptians had advanced knowledge of geometry.
b. People think that the ancient Egyptians had advanced knowledge of geometry.
A bike with no pedals __________ by Karl Drais in 1817. (design)
A bike with no pedals was designed by Karl Drais in 1817.