I have no idea as to knowing how it is done.

I have no idea as to knowing how it is done. I have no idea as to how it is done. I have no idea as to know how it is done I have no idea how to I have no idea of how to do it.去掉of这句话对吗、 i have got no idea how to do with it哪里错 I have no idea 后面可不可以直接接how to do it? I have no idea of how to do it----of how to do it是定语吗 how is Emmy?I have no idea,She hasn't written to me __ we me I have three Excel homework as follow,but I have no idea how I have no idea about it. I want to eat an apple but I have no idea how to