write down what you think is a rule that could explain what makes a sentence grammatically correct or not. For example, you migh
t write something like: "verbs always match nouns in number, and they usually come before the noun." In other words, make your best guess for the grammar rule that makes sense out of the pattern(s) you see in the phrases you have been working with.
Adjectives can modify nouns while adverbs can modify adjectives, verbs, adverbs and sentences. Adjectives and adverbs always match in number with what they are modifying (adverbs match in number with the adjectives, the verbs, the adverbs and the sentences they modify and adjectives match in number with the nouns they modify).
when the subject is masculine then the adjective ends with an "o". If the subject is feminine the adjective is an "a". Also if the subject or noun is plural then the adjective also has to be plural for both feminine and masculine nouns. Adjectives are words that add information about nouns. Adjectives need to agree in gender and number with the noun they modify.