1 To make regular nouns plural, add s to the end. cat cats. house houses. 2 If the singular noun ends in s, ss, sh, ch, x, or z, you usually add -es to the end to make it plural. iris irises.
First-person possessive pronouns are used to represent something that belongs to you. They are mine (singular) and ours (plural). They are closely related to the first-person possessive determiners my (singular) and our (plural).