unawares

"To prepare for the upcoming exam, she forethought carefully about the topics she needed to review. "

"John and I have been friends ever since we were roommates at college.   Trust is important between friends.   I used to find it hard to make friends when I was shy."

"The magician was revealing his trick by showing how the disappearing box worked. "

"The car's broken-down behind the school. "

"a horse that startles easily"

"Go easy on him: he is but a child."

"Kangaroos are known for their ability to jump high."

"He spoke loudly so that his brother could hear him from across the street."

"It was a surprise to find out I owed twice as much as I thought I did."

"The meeting ended unexpectedly early, leaving us with extra time before dinner. "

"My sister inadvertently left the oven on, causing the kitchen to overheat. "

"The school is located just outside the town, without the main shopping area. "