比如说 He has a dog.这里主语就是 He 谓语是 has 宾语是 a dog主语宾语是名词,谓语是动词
主语是 i you he she it we they my our your his her its their,谓语是 am are is ,宾语是me.只要一组句子里有谓语就可称为主谓宾结构。没有谓语就是主系表结构。明白了吗