1. No language: usually considered as hearing problems or aphasia.

2. Instant parody: The changeable parody is considered as the communication intention of autistic children, while the rigid parody mostly has no communication intention.

3. Procrastination: It is also communicative or non-communicative to repeat certain words, idioms, sentences, whole poems or songs endlessly after a period of time, which is usually related to situations and pressures.

4. Speak without emotion: I'm just talking to you, not talking to you, and I don't have the characteristics of asking and answering questions and coming and going freely when ordinary people talk.

5. Unable to master the tone and volume: Speaking like a puppet is very mechanized, and it is impossible to express emotions or feelings through the tone, rhythm and cadence of the voice. Different volumes cannot be used for different situations.

6. The meaning of a word can't be changed: for example, school and correction can't distinguish its pronunciation.

7. Pronoun inversion: pronouns such as "you", "I" and "he" are confused.

8. Unclear concepts of affirmation and negation: "No" is often used and "Yes" or "Good" is rarely used.

9. Immature grammatical structure: He can use his own language, and usually only people who have frequent contact with him understand the hidden meaning in his language.

10. Seldom ask questions: They seldom ask questions except compulsion.

1 1. fixity: repeat a sentence no matter how the situation changes.

12. You can't use causal language: words such as because, so, therefore, if, etc.