homework是不可数名词。因为作业是没法计算出具体数量的，所以是不可数名词。homework做主语时谓语要用单数形式。

homework

un.(学生的)家庭作业;准备工作

1、（学生的）家庭作业

I still haven't done my geography homework.

我还没做完地理科家庭作业呢。

How much homework do you get?

你有多少家庭作业？

My homework today is to write a composition.

我今天的作业是写一篇作文。

2、准备工作

Before you go near a stockbroker,do your homework.

找股票经纪人之前，先要做好必要的准备工作。

I have to do a lot of homework for tomorrow's meeting.

明天要开会，我还要做许多准备工作。

You could tell that he had really done his homework .

你能看得出他确实做好了*准备。

housework

un.家务劳动;家务事

Housework keeps mother on the fly all day.

家务劳动使母亲整天忙忙知碌碌。

We alternate in doing the housework.

我们轮流做家务。

I often help my mother with housework on weekends.

我经常在*帮我妈妈做家务。