Graded and ungraded adjectives
Pattern 29: such a ADJ n that, such ADJ n that
The adjective is followed by a noun. The noun is followed by a that-clause. If the noun is a singular count noun, the adjective follows a. The noun group begins with such. The that-clause indicates a consequence.
She ran her business like an expert, but she had such a good time doing it that she never considered it work.
They are known as the forgotten whales; 65 species of small whales, dolphins and porpoises that have been hunted in such large numbers over the last decade that many now face extinction.