Answer:

The sentence "The old book had lost its original cover long ago" contains several adjectives that describe different nouns and provide additional information about them. The adjectives in this sentence are:

1. old: This adjective describes the noun "book" and provides information about its age. It tells us that the book is not new but rather has been around for a long time.

2. original: This adjective describes the noun "cover" and provides information about its nature. It indicates that the cover was the first one that the book had when it was new.

Let's break down the sentence further to understand the function of each adjective:

- The: This is an article that precedes the noun "book." It does not function as an adjective in this sentence but rather indicates that a specific book is being referred to.

- old: This adjective describes the noun "book" and provides information about its age. It tells us that the book is not new but rather has been around for a long time.

- book: This is a noun that refers to the object being described in the sentence. It is not an adjective but rather the subject of the sentence.

- had lost: These are verb phrases that describe the action of the subject (the book). The adjectives in this sentence do not include the verb phrases.

- its: This is a possessive pronoun that indicates ownership. It does not function as an adjective in this sentence but rather shows that the book had lost its own cover.

- original: This adjective describes the noun "cover" and provides information about its nature. It indicates that the cover was the first one that the book had when it was new.

- cover: This is a noun that refers to the protective layer of the book. It is not an adjective but rather the object of the verb "lost."

In summary, the adjectives in the sentence "The old book had lost its original cover long ago" are "old" and "original," which describe the nouns "book" and "cover," respectively.