Determinative form of い-adjectives
The second form of the い-adjective is the determinative form. This serves to qualify the noun it accompanies.
たかい ほん expensive book (book which is expensive)
The determinant precedes the determined noun. It is an absolute rule in Japanese.
これは おもしろいえいがです。 This is a interesting film.
たかいネクタイです。 It is a expensive necktie.