Gradable adjectives are those that can have different degrees of intensity such as angry, bad, beautiful, big, cold, crowded, good, hungry and small.
My dog is very small. → The modifier changes the intensity of the adjective
My dog is quite small. → very small is smaller than quite small
The modifiers we can use with gradable adjectives are:
*We use rather with negative adjectives to mean bastante.
He was rather rude to me yesterday.
We use rather with positive adjectives to imply that it is surprisingly positive (sorprendentemente)
His performance was rather good.
You can review modifiers with gradable adjectives in C1.1 Unit 1