I can only stay for an hour.

His music collection includes not only rock and jazz but also a lot of pop.

If only I had studied harder, I would have passed the exam.

She is the only child in the family.

I didn't want to attend the party, only my boss asked me to go.

I will go to the party only if you come with me.

They worked hard only to fail.

Not only did she study hard, but she also participated in various extracurricular activities.

You have only to write your name in here to attend the meeting.

There are only so many hours in a day, so make sure to use them wisely.