Who’s vs. Whose

The rules of grammar can be challenging. One of the rules I often get confused is when to use who’s vs. whose in a sentence? Hopefully this post can help others who have the same problem.

Most people know that who’s is a contraction of “who is” and that whose is simply a pronoun. An example of how it is used we can use the sentence:
Who’s the man whose car is parked illegally?

Who’s is a contraction who and one of the verbs is or has. When who is combined with is, the apostrophe replaces the i, “who is” becomes who’s. In the same way when who is combined with has, the apostrophe replaces the h and the a, “who has” then becomes who’s. Some examples:
Who’s been sitting in my chair?
(Who has been. . . )
Who’s going to be able to attend the education seminar?
(Who is going to . . .)

Who’s is pronounced /HOOZ/.

Whose is the possessive form of who. Here are some examples:
Interrogative pronoun:
This is my blue shirt, whose is the green one?
Whose car is parked in my parking place?

Differentiating Who’s and Whose
I just recite the sentence back in my head and ask myself if it is more proper when I replace who’s with, who is?, who has?, or whose.
Because who’s and whose are both correct spellings, it’s a good idea to use the grammar check in your word processor and/or spell check.