homework是不可数名词.
老师上课说do some homework，意思就是做一些家庭作业，homework没有用复数形式。此外，它的根词是work，工作，本身也是不可数名词。
是不可数名词。
n. 家庭作业，课外作业Have you finished your homework today?
你今天完成作业了吗
I have a mountain of homework to do.
我有一大堆准备工作要做。
More and more people prefer to do homework.
越来越多的人更愿意做在家中进行的工作。
You can't watch TV until you've done your homework.
做完家庭作业之后你才能看电视。
I can't come out to play until I've finished my homework and my chores.
我没完成作业和家务之前不能出去玩。
