我们的计划有三门商务英语课程。

Our program has three courses in business English.

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有三门考试，分别是语文、数学和英语。

I had three exams, Chinese, math and English. In the morning, it was the Chinese.

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他因酗酒问题，上学期四门功课有三门不及格。

Because eof his alcohol problem, he flunked out of three out of four classes last term.

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There are three different ones on this Sunday, this Monday, this Tuesday.

我们有三门不同的课程，分别在这周天，周一和周二开讲。

哈佛公开课 - 计算机科学课程节选