I don‘t know who is the teacher 还是I don't know who the teach

I don't know who the watch____ 我不知道谁是凶手,I don't know who is the murderer 还是 I don't know wh I don't know the teacher----- is 关于宾语从句的问题 I don,t know who is the best one I don.t know who The guy who i love you don't know me I don,t know who broke the window i don't know what this is.do you know who the girl standing I don`t know who invented the telescope,but I think it is a 改错:I don't know the boys who is under the tree. 用英语怎么说?是：I don't know who is she .还是 I don't konw who she is although i don't know who are you 还是 although i don't know w i don't know who will come