The apostrophe (‘) along with an s shows possession.
Dad has a car. It is Dad’s car.
Mom has a job. It is Mom’s job.
Betty has a dog. It is Betty’s dog.
Adding the apostrophe and the s shows possession.
Add ‘s to a noun when that noun has possession of something.
It’s your turn. Write the word with an apostrophe to show possession. This house belongs to Mary. It is ____ house. Did you write her name with an apostrophe s? Good for you!