The infinitive and conjugated form of the verb is:
Infinitive form: <u><em>Patinar</em></u>.
Conjugated form: <u><em>Yo patino</em></u>.
Explanation:
The verb "skate" refers to the use of skates or skateboards and can be conjugated in Simple Present in the following way:
<em>Yo </em><u><em>patino</em></u><em>.</em>
<em>Tú </em><em>patinas.</em>
<em>Usted </em><em>patina.</em>
<em>Él </em><em>patina.</em>
<em>Ella </em><em>patina.</em>
<em>Ello </em><em>patina.</em>
<em>Nosotros/Nosotras </em><em>patinamos.</em>
<em>Ustedes </em><em>patinan.</em>
<em>Ellos/Ellas </em><em>patinan.</em>
How the personal pronoun used in the phrase is <em>"yo"</em>, the right conjugated form is <u><em>"patino"</em></u> and the infinitive form is <u><em>"patinar"</em></u>.