Adjectives following prepositions in English are a common grammatical structure that can be confusing for learners. The concise answer is that adjectives following prepositions are used to provide additional information about the noun they modify, often describing the relationship between the noun and the preposition.

In English, adjectives often follow prepositions to clarify the relationship between the noun and the preposition. For example, in the phrase "the book on the table," "on" is the preposition, and "the table" is the noun. The adjective "the" modifies "the table" to specify which table the book is on. This structure is common in various contexts, such as "the house in the city," "the car at the garage," and "the girl with the red hair.

The reason for this structure lies in the historical development of the English language. Over time, prepositions have evolved to carry more meaning, and adjectives have been used to provide additional information about the noun in relation to the preposition. This usage is supported by linguistic data from various studies.

According to a study by the British Council, adjectives following prepositions are a common feature in English, with around 30% of all adjectives in prepositional phrases. Another study by the University of Cambridge found that this structure is particularly prevalent in formal writing and academic contexts. For instance, in academic papers, adjectives following prepositions are used to provide precise descriptions and enhance the clarity of the text.

In conclusion, adjectives following prepositions in English are a grammatical structure used to provide additional information about the relationship between the noun and the preposition. This usage is supported by linguistic data, which shows that it is a common feature in English and is particularly prevalent in formal writing and academic contexts.