volunteered

"She made an intentional effort to be kinder to her brother after their argument. "

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

"The leaky faucet dropped water onto the counter all night. "

"She voluntarily stayed after school to help the teacher grade papers. "

"The heavy cultivation of the hillside led to soil erosion."

"Except for one or two days a year, he usually walks to work."

"Teaching oneself to swim can be dangerous."

"The volunteer helped organize the school's annual fundraising bake sale. "

"I say I did him a service by ending our relationship – now he can freely pursue his career."

"The explanation was long and drawn-out."

"He offered his help unprompted, which surprised everyone. "

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