Final answer:
The five main members of the lexical category group in English are: Nouns, Pronouns, Verbs, Adjectives, and Adverbs.
Step-by-step explanation:
The five main members of the lexical category group are Nouns, Pronouns, Verbs, Adjectives, and Adverbs. These are the words that make up the majority of the English language. Nouns represent people, places, or things. Pronouns replace nouns. Verbs express actions or states. Adjectives describe or modify nouns. And adverbs modify verbs, adjectives, or other adverbs.