We look at the picture.
at是介词,the picture是宾语,介宾结构
I am a teacher.
am是系动词,系动词后的名词或代词不叫宾语,叫表语。
Let me hear you play the piano.
you是宾语,play the piano动作的发出者是you,即宾语,故play the piano是对you的补充,承宾语补足语。
She is a pretty woman.
pretty修饰woman,做woman的定语。
We got there on time.
on time修饰动作,“我们按时到达那儿。”,on time是状语。
以上都不属于宾语。