Homework家庭作业和housework家务活这两个词都是不可数名词，没有单复数之分。例如，he is doing his homework while his mother is doing housework。对于不可数名词而言，没有复数形式也不存在给后面加s的情况。这两个词中共同有的work这个词本身做名词的时候，就是一个不可数名词。
1.homework作业和house work家务事，家务劳动。这两个词都是不可数名词没有复数。
2.名词分为可数名词和不可数名词。可数名词有复数形式。不可数名词没有复数形式。
3.He often does his homework at school.He has a lot of housework to do at home every day.
