1.homework的基本意思是“家庭作业”,指课外应预习或复习的功课,是不可数名词。
2.用于比喻homework可指会议等的“准备工作”,是不可数名词。
3.在英国,文科学校和私立学校通常把“家庭作业”叫做prep.,即preparation of lessons。现在,也有很多人用assignment来表示。

do one's homework
做必要的准备工作 make adequate preparation
He had done his homework before the tour started, and his basic ideas were sound.在开始参观访问之前他先了解了情况,所以他的基本观点正确。
That last candidate impressed me with his knowledge of the company's activities, he has really done his homework.那最后一位候选人对公司活动的了解给我留下了深刻的印象,他确实做了充分的准备工作。

My homework is complete.我的家庭作业完成了。
By doing a little extra homework, the girl got ahead of the rest of the class.这个女孩做了一些额外的作业就超过了班里其他同学。
It takes him half an hour to finish his homework every day. 他每天完成作业要用半小时。
Has your homework been corrected?你的作业批改了吗?
She completed her homework early in the morning.她一早就把家庭作业完成了。