What is the singular possessive of Carlos?

Answer 1

There are two accepted forms for possessive singular nouns ending in s:

Add an apostrophe (') after the existing s at the end of the word: Carlos'

Add an apostrophe s ('s) after the existing s at the end of the word: Carlos's

Examples:

Carlos' mother will pick us up at three.

Carlos's mother will pick us up at three.

Note: If you are a student, use the form that is preferred by your teacher.