Quotation marks引号(“ ”)
a. Use quotation mark to enclose what someone says.
b. Do not use quotation marks with indirect quotations.
c. If a quotation is half direct and half indirect, do not use quotation marks unless you want to emphasize the quotation
d. Thoughts or questions in someone’s mind (in other words, ideas not spoken out loud) do not need quotation marks.
e. Use quotation marks for definitions.
f. Use quotation marks for sayings.
g. Use quotation marks for labels, markings, signs, etc.
例句：Label this container “good toys” and that one “broken toys.”
h. Use quotation marks to indicate the clever or silly use of a word.
标点符号和双引号的位置： 1. Commas and periods always go inside the quotation mark.
2. Colons and semicolons always go outside the quotation mark.
3. If a quotation within a quotation, use single quotation marks around it.
4. If only yes or no is quoted, you do not have to use quotation marks.