Adjectives and adverbs don't form the core of sentences as nouns and verbs do, but they give sentences texture and precision. Without adjectives and adverbs, you wouldn't know what color the curtains were, how the man crawled, when they came, etc. Use adjectives and adverbs when they contribute directly to what you are saying. For example, in “He smiled sadly,” you know his smile is not like the usual happy smile. Sadly performs a function. On the other hand, in “He screamed loudly,” does the adverb add anything to the verb? No, because there is no such thing as a soft scream. Here, loudly is unnecessary. Avoid using adjectives and adverbs that don't add anything or that state the obvious.
Adverbs often end in ‐1y ( remarkably, quickly, happily, slowly), but not always ( here, there, fast, late, hard). And some adjectives end in ‐1y (a lively child, friendly dog , hilly area). To decide whether a word is an adjective or an adverb, you should look at what part of speech the word modifies, not the word itself: Adjectives will always modify nouns and pronouns, while adverbs modify verbs, adjectives, and other adverbs. Review these examples.