1. Apostrophes 3: Your Sentences
1. All the pupils seats were taken.
2. Mud had covered all of the girls' dresses.
3. The Allens’ house burned to the ground last night.
This book must be someones.
5. I found another’s concept whose time had come similar to yours.

2. 1. All the pupils’ seats were taken.
Incorrect!
It’s posessive, plural, and ends in “s”

3. Apostrophes 3: Your Sentences
1. All the pupils seats were taken.
2. Mud had covered all of the girls' dresses.
3. The Allens’ house burned to the ground last night.
This book must be someones.
5. I found another’s concept whose time had come similar to yours.

4. 2. Mud had covered all of the girls' dresses.
Correct!
It’s posessive, plural, ends in “s”, so it goes there.

5. Apostrophes 3: Your Sentences
1. All the pupils seats were taken.
2. Mud had covered all of the girls' dresses.
3. The Allens’ house burned to the ground last night.
This book must be someones.
5. I found another’s concept whose time had come similar to yours.

6. 3. The Allens’ house burned to the ground last night.
Correct!
The house belongs to “The Allens,” not “The Allen”

7. Apostrophes 3: Your Sentences
1. All the pupils seats were taken.
2. Mud had covered all of the girls' dresses.
3. The Allens’ house burned to the ground last night.
This book must be someones.
5. I found another’s concept whose time had come similar to yours.

8. 4. This book must be someone’s.
Incorrect!
It’s posessive.

9. Apostrophes 3: Your Sentences
1. All the pupils seats were taken.
2. Mud had covered all of the girls' dresses.
3. The Allens’ house burned to the ground last night.
This book must be someones.
5. I found another’s concept whose time had come similar to yours.

10. 5. I found another’s concept whose time had come similar to yours.
Correct! And, Correct!
The “concept” belongs to “another”
Also, “yours” is a possessive pronoun.

11. Apostrophes 3: Your Sentences
1. All the pupils seats were taken.
2. Mud had covered all of the girls' dresses.
3. The Allens’ house burned to the ground last night.
This book must be someones.
5. I found another’s concept whose time had come similar to yours.