Tom has never been to China..(在第一个助动词后)

问题描述:

Tom has never been to China..(在第一个助动词后)
这里的has是助动词吗?

has是第三人称单数后边的助动词,这里是现在完成时,真正的动词时:been,原型就是be,be这里是个连系动词,英文里边叫做linking verb,这里是主系表结构.