You are belong to sb . 为什么you 后面要加be 的?

You are belong to sb . 为什么you 后面要加be 的? you are belong to This suitcase belong to you.They are后面添什么,为什么 you的be动词为什么要加are? you的be动词为什么要加are 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? you后面的be动词为什么只能是are you are not be alone 为什么要加be呢? All you base are belong to us you的be动词为什么要加are要是you是单数呢 英语翻译“I belong to you,you belong to me,you are my sweet”英文大概是 seem to be为什么seem 的后面要加to