We were having a lesson about Chinese culture at this time yesterday.

昨天这个时候我们正在上一节关于中国文化的课。

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They are having a lesson.

他们正在上一节课。

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They are not having a lesson. They are cleaning the classroom.

他们不是在上课，而是在打扫教室。

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Watson, who with wife Angie adopted a son, Caleb, two weeks ago, also boasts of never having a golf lesson.

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Having learned a lesson, we reacted.

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You may have learned your lesson about having a large mortgage.

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