I am ateacher .a teacher是宾语还是表语?

题目

I am ateacher .a teacher是宾语还是表语?
如果是表语,那不就没有宾语了么,这样有关系的么?
注意啊```！帮我解决下这个``
Tom will become a better man.a better man就是表语？
become是动词，后面应该是宾语吧`
The people here are very friendly.这里有无表语啊``
如果是表语，那 very friendly 是表语还是就单单friendly

答案

表语.be 是系动词,系表结构能够构成句子,属于简单句
Tom will become a better man.a better man就是表语?—————— 对的,become也是系动词
become是动词,后面应该是宾语吧`————不对 become也是系动词
The people here are very friendly.这里有无表语啊``————有的,very friendly就是,因为有了be