Retinol has the effect of preventing skin aging.

He was working on that project round the clock.

He is working round the clock.

Every sixth day of the month, we go on a picnic as a family.

He is a second-year high school student.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.

My house is in the middle of the town.