I am finished 这里为什么要用be finished?

I am finished 这里为什么要用be finished? 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 You shall borrow the book when I have finished reading it为什么要用have finished,这里是有什么语法呢,finished不可以吗 I am happy to just keep on until it is finished这里的just 关于现在完成时.(英语语法的问题)i have not finished the work yet.finished 是非连续性动词为什么在这里要用finished?还有i have not finished the work有什么很大的区别?这句有什么语法错误吗?i have no finished something worth doing should be finished in our lifetime.这里finished为什么要改为completed? I will go to see you when you finish/finished/have finished the course是哪个,为什么如果这里只给你finish/finished呢？是选一个 I am finished是被动语态吗是被动语态，为什么 英语be动词i am a student.这里为什么要加am 而不说成i a student是什么道理.i love you 这里又不加am‘如果说成i am love you又错在哪里? It was not until I had finished all my homework that I went to bed last night.这里为什么要用had? I will go as soon as I have finished my lesson.这里的从句为什么要用现在完成时而不用原形? when I am finished会错吗?为什么是am ,不是have? I am always late for school为什么这里要用be动词 I AM FROM ___USA 这里要加the吗?还要说明为什么 I nearly finished.这句话是我快要完成了的意思 这里的finish 不是将来要完成的动作吗 为什么这里要用过去I nearly finished.这句话是我快要完成了的意思 这里的finish 不是将来要完成的动作吗 为什 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 had finished reading the novel by nine o'clock last night 这里had done 后面为什么会是reading