done 可以当作形容词用,但是不是你这些用法,你可以查字典看看例句。
貌似有老外会说 I'm done my homework,不过这被视为不规范,通常会加上 with - I'm done with my homework,朗文字典的说法是:somebody is done (with something) (=someone has finished doing or using something)。
因为 done 是形容词,所以如果你说“我的作业(被)做完了”,可以说 My homework is done,朗文字典有这条例句:The job's nearly done,而剑桥字典的例句是:The washing-up's done, but I've left the drying for you。