The correct sentence with the appropriate use of apostrophes is:
Clementine said the books were hers, but Darian and I both knew they were Henry's.
Clementine said the books were her's, but Darian and I both knew they were Henry's.
Clementine said the books were hers, but Darian and I both knew they were Henrys.
Clementine said the book's were her's, but Darian and I both knew they were Henry's.
Clementine said the books were hers, but Darian and I both knew they were Henry's.
1 answer
The correct sentence with the appropriate use of apostrophes is:
Clementine said the books were hers, but Darian and I both knew they were Henry's.