1. Adjective Clause 3
Whose

2. The man helped the son whose paper route was the longest.1
Weak sentence
The relative pronoun whose is used as a possessive pronoun in an adjective clause.
The man helped the son, and this son’s paper route was the longest. [whose]
Best sentence
The man helped the son whose paper route was the longest.

3. Whose: possessive, belonging to something (their, his, her, ‘s)
1. A local firm got the order, and its bid was the lowest.

4. Whose: possessive, belonging to something (their, his, her, ‘s)
1. A local firm whose bid was the lowest got the order.

5. 2. The store wants stockers, and their time is flexible.
Whose: possessive, belonging to something (their, his, her, ‘s) Which: animals or things
2. The store wants stockers, and their time is flexible.

6. 2. The store wants stockers whose time is flexible.
Whose: possessive, belonging to something (their, his, her, ‘s) Which: animals or things
2. The store wants stockers whose time is flexible.

7. 7
Whose: possessive, belonging to something (their, his, her, ‘s)
3.Dorothy Parker was a writer, and I always enjoyed this writer’s stories.

8. 3. Dorothy Parker was a writer whose stories I always enjoyed.8
Whose: possessive, belonging to something (their, his, her, ‘s)
3. Dorothy Parker was a writer whose stories I always enjoyed.

9. Whose: possessive, belonging to something (their, his, her, ‘s)
4. The boy is going on vacation, and I just borrowed his book.
5. The boy was unhappy, and his bike had a flat tire.
6.The girl was not at work, and Betty knew her sister from school.

10. 4. The boy whose book I just borrowed is going on vacation.
Whose: possessive, belonging to something (their, his, her, ‘s)
4. The boy whose book I just borrowed is going on vacation.
5. The boy whose bike had a flat tire was unhappy.
6. The girl whose sister Betty knew from school was not at work.