am having 與 shall have有什麼分別?

am having是所有 （常複數）持有物；所有財產
I/we shall -used to express what you will do in the future 我/我們將要〔用於表示未來要做的事〕
We shall be away next week. 我們下週不在這裡。
I shall have finished it by Friday. 到星期五我就會把它完成了