请问am.is.are.和do.does.分别怎么用？

请问am.is.are.和do.does.分别怎么用？

一般现在时主系表句型里用isamare主语是第三人称单数用isI后面用am,其它情况用areHeisastudent.Iamastudent.Youareastudent.助动词does主语第三人称单数do用于其它情况。Doeshegetupearlyeveryday?Theydon'tgetupearlyeveryday.