have 和get的用法~一直搞不清

have sb do sth/ get sb .to do sth.都是 使某人做某事。
i have him repair the door= i get him to repair the door.我叫他修门
have sth. done . 使某物被怎么样
如。i have the door repaired. 同上句意思。
你具体啥不懂啊？也列个句子，好有针对性的回答啊
have表示”使“时（即用做使役动词）的用法有三种：
1.have sb/sth do sth:表示使某人做某事。
例：The teacher has students do homework every day.
2.have sb/sth dong sth:表示使某人一直做某事
例：He has the horse running all day.
3.have sb/sth done:表示使某人被...
例：He has his hair cut by his father.
另外，表示动词时，“有”的意思。
I have a book。我有一本书。
Do you have a book？
I don’t have a book。（也可以说I haven’t a book。不常用）

表示助动词时。“使……” 的意思
have sb do 让某人做
have sb doing 让某人一直做
have sb/sth done 某人/某物被……

have to，“不得不，必须”，表示不是主观意愿
It’s dark outside，I have to go home。天黑了，我不得不回家。
Do you have to……。
I don’t have to……。

用于完成时
have+动词的过去分词

在由have作谓语的句子变疑问句或否定句时，在美式英语中，无论何种情况，都要借助于助动词do或does。例如：
Do you have