Grammar Question

<p>Hello,</p>

<p>If there is a name that ends with an 's', how would I say it in the possesive form like this:</p>

<p>Ex. If I want to say that there is a person named pegasus that had a blue car.</p>

<p>Would it be like : Pegasus's car is blue.
or?
Pegasus' car is blue.</p>

<p>which one</p>

<p>A popular rule of thumb is add an apostrophe-s if you’d pronounce it that way. But it’s irrelevant–the SAT does NOT test this convention.</p>