I have four classes in the morning.

我上午有四节课。

youdao

I have four classes in the morning.

早上我有四节课。

youdao

We have four classes in the morning and two classes in the afternoon.

在早上我们有四节课下午两节课。

youdao

And so you are really good friends with like all the people you're in class with, because you know them since like four years and you have all classes together with them."

VOA: special.2009.11.05

What have we done over the last three or four lectures? We've started introducing you to classes of algorithms. Things that I'd like you to be able to see are how to do some simple complexity analysis.

我们在过去三节或四节课中讲了什么？,我开始向你们,介绍算法的类型,我想你们知道的是,如何做一些简单的复杂度分析。

麻省理工公开课 - 计算机科学及编程导论课程节选

where I would have, I think four classes one after the other on Wednesdays.

在那一段时间，我在周三会连续上四节课。

耶鲁的忙碌生活 - SpeakingMax英语口语达人

As freshman women, you have four classes of men to choose from.

FORBES: I Graduated From Princeton, And I Married a Princeton Man

So, by the time you are a senior, you basically have only the men in your own class to choose from, and frankly, they now have four classes of women to choose from.

FORBES: I Graduated From Princeton, And I Married a Princeton Man

His recruiting classes have been ranked in the top 10 for three of the last four seasons.

WSJ: Boeheim plans on being back at Syracuse