你可以用 "help a sick classmate" 来表示帮助患病的同学。这是一个比较常见的表达方式，可以用在日常生活中的各种场合。

下面是一些例句：

I want to help my sick classmate by bringing her some soup and a warm blanket.
Can you help me find ways to support my sick classmate? She's been struggpng with her illness for a long time.
I'm worried about my sick classmate. I think I should check in on her and see if there's anything I can do to help.

翻译如下：

我想通过给她带些汤和温暖的毛毯来帮助我的患病同学。
你能帮我想办法支持我患病的同学吗？她一直在与疾病斗争。
我担心我的患病同学。我觉得我应该查看一下她，看看有什么我能做的帮助。