An apostrophe can be used to show ownership, and it can be used in conjunction with contractions. Find out when to use apostrophes with plural subjects and verbs with help from a certified tutor in this free video on punctuation and the English language. Expert: Paige Carrera Bio: Paige Carrera is a certified tutor for both Hillsborough and Pinellas Counties in the Tampa Bay area of Florida. Filmmaker: Christopher Rokosz