完成作业的英语表达是 finish one's homework。例如：

1. I have finished my homework.

2. She always finishes her homework on time.

此外，还可以用以下表达方式：

complete one's homework diligently

do one's homework

succeed in finishing the homework

这些表达都可以用来描述完成作业的情况，具体使用哪个取决于语境和所需的详细程度。