Question

Which of these plural forms is incorrect?

• A. 1960's
• B. PhDs
• C. fours
• D. TVs

Answer 1

Answer:

A. 1960's

1. Plural Form Error: The incorrect plural form is using an apostrophe to form the plural of a decade.

2. Incorrect Example: The given example, 1960's, is incorrect.

3. Correct Plural Form: The correct plural form is 1960s.

4. General Rule: To form the plural of a decade, simply add s to the end of the number.

5. Correct Examples:

6. 1960s

7. 1990s

8. 2000s

9. Incorrect Examples:

10. 1960's

11. 1990's

12. 2000's