讲词的属性,未免太狭隘．． 严格意义上讲是BE 动词．．．．．
但BE 动词又是什么东西呢?
很难解释,不如给你弄几个简单的句子吧 ：
how are you
who are you
what are you doing ?
what the hell are you doing ?
there are alwaysstupid guys out there .
拿KUNGFU panda 里的老虎说的话：
if you respect who we are ,what we do ,you will be gone by morning.
你再学英文5年 便不会问什么词性不词性了.．．．．lz加油吧 ．～!