Identify and correct errors with compound and joint possession

1. Understanding Possession

Possession refers to ownership or the relationship between nouns. There are two types of possession: joint possession and compound possession. Understanding these concepts is crucial for clarity in writing.


2. Joint Possession

Joint possession occurs when two or more nouns share ownership of a single item. In this case, only the last noun in the series receives the possessive form.

a. Structure

  • Use ‘s for the last noun to show possession.
  • Example:
  • Correct: Sarah and John’s project (the project belongs to both Sarah and John)

b. Common Errors

  • Incorrect: Sarah’s and John’s project (implies each has a separate project)
  • Correct: Sarah and John’s project

3. Compound Possession

Compound possession occurs when two or more nouns own multiple items. Each noun in the compound needs to be possessive.

a. Structure

  • Add ‘s to each noun to indicate individual ownership.
  • Example:
  • Correct: Sarah’s and John’s projects (each has their own project)

b. Common Errors

  • Incorrect: Sarah and John’s projects (implies one shared project)
  • Correct: Sarah’s and John’s projects

4. Key Differences

TypeDescriptionExample
Joint PossessionShared ownership of a single itemMary and Tom’s house
Compound PossessionIndividual ownership of multiple itemsMary’s and Tom’s houses