regretting

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

"I was going to go shopping, but I went dancing instead."

"Let me tell you how it happened."

"History repeats itself if we don’t learn from its mistakes."

"The constant noise from the construction site made it hard to concentrate on my homework. "

"I need to study my biology notes."

"I brush my teeth regularly to prevent them from turning yellow."

"Absence makes the heart grow fonder."

"He regretted his words."

"It is generally known that the Earth is round."

""Everyone makes mistakes when they are learning something new." "

"After careful consideration, the student made a decision about which college to attend. "