How long were you by yourself in the house?

你自己一个人在屋里待了多长时间？

《牛津词典》

Oh, well done, Sherlock. Did you figure that out all by yourself?

喔，干得好，大侦探。你全是自己推断出来的吗？

《牛津词典》

Are you sure you did this exercise by yourself?

这个练习真是你自己做的吗？

《牛津词典》

The song is about driving by yourself at night into the unknown and feeling free.

VOA: special.2010.05.28

what would it mean to read this letter out loud in a community, not alone in your dorm room,or just by yourself,in the library?

为什么书信要在人群中大声朗读，而不是在寝室里，图书馆里一人看？

耶鲁公开课 - 新约课程节选

You told me that you've written plays by yourself. How long did it take you to finish them?

你告诉我你自己写剧本。写完一个剧本要多久呢？

灵感从何处来 - SpeakingMax英语口语达人

It's a constant balancing act, but the key is to feel comfortable going by yourself.

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Go in advance to the restaurant you choose, by yourself or with a friend.

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The ten sacred minutes by yourself with your coffee in the morning before the day starts.

FORBES: Give Yourself A Break: Why Doing Less is the Smartest Thing You Can Do