incidental

"Burning wood for heat produces ash as a byproduct. "

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

"The bus is approaching the stop, so get ready to board. "

"The liftoff will occur in exactly twelve seconds."

"We bought small souvenirs at the museum to remember our class trip. "

"This question arises frequently."

"Surprisingly, my sister decided to volunteer at the animal shelter this weekend. "

"The reflection in the window showed the changing colors of the sunset. "

"The main character in the school play was a brave student. "

"Our company associated with a local charity to help raise money for their programs. "

"If you miss your curfew, a consequence is having to stay inside and do chores. "

"We have to get people out of their cars and encourage them to use alternative forms of transportation."