Here is your umbrella and coat.后面两件东西 前面be 动词为什么不能用are?

Here is your umbrella and coat.后面两件东西 前面be 动词为什么不能用are? Here is your umbrella and your coat. here is your umbrella and coat 新概念英语第一册第三课中这句话--Here is your umbrella and your coat .be动词为何 为什么here is your book and your coat的谓语动词用is不用are? here is your umbrella and your coat.这句话为什么用is 为什么Here is my umbrella and my coat用is 反过来就用are? Here your umbrella and your coat. 为什么here you are,be动词加在人称后面而here is ,be动词在人称的前面? here is you umbrella and your coat.这句话其中your不加行不行?加不去有什么用,不加 新概念英语第一册第三课Here is your umbrella and your coat “Here are your umbrella and coat”和“I beg you parden”这两个句子的用法