preformed

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The building of the bridge will be completed in a couple of weeks."

"The bird's nest was a concrete example of how strong and carefully constructed things can be. "

"He assembled the model ship."

"He assembled the model ship."

"an advance in health or knowledge"

"Construction is underway on the new bridge."

"The operation of the new coffee machine is quite simple. "

"We constructed the radio from spares."

"The process of baking a cake involves several steps, from mixing the ingredients to putting it in the oven. "

"The carpenter built a new wooden bookshelf for my bedroom. "

"Before dinner, I finished my homework. "