girl是表语,和系词is一起做谓语,be 是英语中的典型系词,其它系词比如：look、sound、taste、get、become、turn等,都可以跟形容词或者名词等做表语,例如, You look pale today,what's the matter with you The days are becoming shorter and shorter these days.两句中的pale 和shorter and shorter 都是表语.宾语一般在及物动词之后,比如：He is driving a car now .中的a car 是宾语.
