Final answer:
In the sentence 'My favourite aunt has a new car', the adjectives are 'favourite' and 'new'.
Step-by-step explanation:
In the sentence 'My favourite aunt has a new car', two adjectives are 'favourite' and 'new'. Adjectives are words that describe or modify nouns. In this sentence, 'favourite' describes the noun 'aunt' and 'new' describes the noun 'car'.
Learn more about Adjectives in a sentence