an adjective is predicative when it follows a linking verb such as ‘be' or ‘seem'. In the sentence ‘She was right and I was wrong', the adjectives ‘right' and ‘wrong' are predicative. Some adjectives, such as ‘afraid', ‘asleep', ‘alive', and ‘unable' are always predicative. 谓语性的,表语的(如She was right and I was wrong 中的right和wrong)