The usage of double quotation marks in English is as follows:

1. stands for direct speech.

When directly quoting more than four lines or more than 40 words, quotation marks are generally not used, but changed to bold, so as to make the boundary with other parts of the article clear.

2. Indicate the titles of short publications, such as magazines, newspaper articles, short poems, short stories and a chapter of the whole book.

3. The words used have special meanings. In addition, when slang appears in more formal articles, it will also be quoted, indicating that it intends to change the style of writing.

4. Used to express words that attract readers' attention or special words that readers are not familiar with.