I am finished drinking.请问这句是什么时态.

I am finished 这里为什么要用be finished? when I am finished会错吗?为什么是am ,不是have? i am finished和i have finished倒底一样不一样 可是说i am finished吗?为什么是finished?这是什么时态?跟i have finished有什么差别? I am finished drinking.请问这句是什么时态. I am finished.I am finished.有没有这样的说法我们英语书里有!这句话是有多难的啊 i was finished i am finished 和 i was finish 三个都是过去式,但是我一直分不清楚 I am going to play football when I ____my home work.Awill finishB.finished C.FINISH 英语翻译As for me,I am the custodian,and I have not finished my homework either. I finish 可以单独成为一个句子吗?与 I am finished 有什么区别嘛 I am happy to just keep on until it is finished这里的just i am already finished watering them这句话对不对.如果对 watering them 做什么成分 I am finished是被动语态吗是被动语态，为什么 英语 i am not finished with my dinner yet 这里为什么要用f英语 i am not finished with my dinner yet 这里为什么要用finished 不用 finish 请问I have finished my work 和I am finished my work有什么用法上的区别么 另外I have been finished my work又算什么事态呢 算不算I am finished 地完成式呢finished在这是形容词 大家帮我分析下 When I ------- my work tomorrow,I will go swimming with you.A.will finish B.have finished C.am finishing D.finished i will return the book to the library as soon as i __itwill finish am going to finishfinishedhave finished I am going to play football when I ____my home work.Awill finishB.finished C.FINISH请说明原因!