I was asked this question today, but I am unsure how to answer that.

Why is

“These others books.”

incorrect but

"This other book."

is correct? I thought other is singular and others is plural.

  • Adjectives in English do not have any marking that indicates grammatical number. The other dog. The other dogs. The big tree. The big trees.
    – TimR
    Commented Nov 1, 2018 at 11:08

1 Answer 1


Other is used both as a noun, and as an adjective.

When using Other as an adjective to describe an object (the "other book"), it will always be used without the s.

However, when using other as a noun identifying the object itself then we have to get the case right -

  • I want to read all these books, and the others.
  • The red book and the other are both heavy

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