1 means direct reference.

2. emphasize it.

3. deny it.

4. Represents a specific title.

5. Used to quote common sayings, proverbs, two-part allegorical sayings, old sayings, famous sayings, professional knowledge and technical terms.

6. Special meanings need to be emphasized.

7. Be sarcastic.

8. Express concern.

9. Used in discourse.

When using double quotes, please pay attention to the following points:

1, pay attention to the position of punctuation at the end of quotation marks. When quotation marks are used independently, the last point should be placed in quotation marks.