I did my home work, in Chinese, I have finished your home work. wǒ zuò wán gōng kè lǎ 我 做 完 功 课 喇

我做了我的功课 wo zuo le wo de gong ke

hello Konan~ i agree with lizi. "i did my homework", i think "did" just can show that you worked on your homework, but maybe you just did a small part, not really finish it~! so you can't say "我做完作业了"，you should say "我做作业了" or "我做了作业". there's a big difference between "做完" and "做了". "做完" means you finished! hope my answer can help you~! :)

我已经做功课了or 我做完功课了

我做完作业了。（wo zuo wan zuo ye le )