Single Quotes/Double Quotes
Other countries can do what they like, but in America, we use Double Quotes for everything!
Even if you’re just using quotes ironically, or for another special purpose, they’re always double, not single quotes.
Correct: McDonald’s “healthy menu” is meant as a joke.
Correct: The word “vague” shows up too often in my notes.
The only proper use of Single Quotes is inside Double Quotes.
Correct: “All our restaurants offer ‘healthy’ menu items,” said Ray Croc.