We form possessives from singular nouns by adding an apostrophe ( ' ) and an "s" to the end of the word. dog = I built the dog's house. man = She fixed the man's phone. student = Is that the student's book? girl = The girl's doll is broken. brother = My brother's bicycle is green.

For example, “dog’s” indicates that the dog owns something. Possessive nouns can be used to show ownership of both concrete and abstract things. For example, “John’s idea” and “the sun’s rays” are both possessive nouns.

Examples of possessive nouns: Karen's Mrs. Smith's Dogs' (more than one dog) Children's (plural not ending in s) Chris's or Chris' (name ending in s) Examples of possessive nouns in a sentence: 1) Mark's dog is a Labrador retriever. 2) My sister's phone is lost. 3) Are we going to the Smith's house?