"gates were built" is a grammatically correct phrase and can be used in written English.
It is a passive construction, indicating that the action of building gates was performed by an unknown subject. Example: "In the medieval era, strong and sturdy gates were built to protect castles from invaders."
Sluice gates were built to raise the water level to irrigate fields.
But the new gates were built and Chris Shaw, Labour leader of North East Lincolnshire Council, says they brought with them Dong Energy, which is developing the 35-turbine Westermost Rough wind farm.
Smaller gates were built between them, such as Friar's Gate.
According to Maqrīzī, the gates were built by three Christian monks from Edessa, who had fled from the Saljūqs.
The Pelton turbines which control the gates were built to Stoney's patent, and carry plates which indicate that they were manufactured by Hanna, Donald and Wills of Paisley.
In the ancient Ethiopian city of Harar several low cubbyhole "gates" were built into the town walls by its founder to let scavenger hyenas enter and clean up the refuse every night.
Terminal C, with 25 gates, was built in 1987 after American Airlines established a hub, signed a 40-year ground lease and began operating 120 long-distance and 90 commuter flights a day.
Thinking again of your computer system as a castle — the walls are built with the operating system and the gates are built with Internet facing applications, like your browser.
These massive gates are built of brick and mortar and are topped with a Prang style spire.
Gates are built onto host molecules so that the opening or closing of such gates is stimulated by reducing or oxidizing conditions, or by ultraviolet irradiation.
Also for Graner he designed a detached house in the Bonanova district of Barcelona, of which only the foundations and the main gate were built, with three openings: for people, vehicles and birds; the building would have had a structure similar to the Casa Batlló or the porter's lodge of the Park Güell.
