how can I know which one is 宾语and which one is 定语？How to make the difference?

Question

Answer

如果它们是一起出现，那么主角是宾语，配角是定语。

Answer

Jesus. Poor girl. so many days. she is still in this question.

宾语 is the target of the activity. 定语 used to decorate 主语 and 宾语。

for instance:

1   宾语         是          动作的        承受者。
  ---------------------------------------------------------------------    
   (主语)         (谓语)             (定语)              (宾语)

2   该死的      定语         是      修饰主语和宾语的   形容词。
  ---------------------------------------------------------------------------------------------    
     (定语)         (主语)          (谓语)             (定语)              (宾语)

Answer

宾语是动作的承受者，定语是对名词和代词起修饰限定作用的词。

Answer

For instance, in the sentence:
 I left my important documents when I left office.
当我离开办公室的时候，我忘记带走重要的文件了。
 "when I left office(当我离开办公室的时候)" is the adverbial（状语）
and the sentence:"my important documents重要的文件" is the object(宾语),it has decorated the verb "left(忘记)"
of course, in the same sentence: my important documents, the word “important(adj.) 重要的”and the word “my（pronoun）我的” decorated the noun "documents", so it is the object( 定语)

Answer

宾语是动作的承受者，定语是修饰名词和代词的．The object is the movement heir, the attribute decorates the noun and the pronoun.