When should I use single quotation marks?

In American English, single quotation marks (‘ ’) are used to indicate quotes within quotes.

Single quotation marks example (American English)
Martinez argues that “the president’s use of the phrase ‘mission accomplished’ undermined his credibility.”

In British English, single quotation marks are typically used in the ways double quotation marks are in American English. So, quotes within quotes are indicated with double quotation marks.

Single quotation marks examples (British English)
Martinez argues that ‘the president’s use of the phrase “mission accomplished” undermined his credibility’.

Try not to use the word ‘really’ in academic writing.

QuillBot’s free Grammar Checker can help you ensure you’re using quotation marks correctly.