Simple adverbs in Greek grammar are commonly used to modify verbs, adjectives or other adverbs by providing more information about the action, quality or manner. They can indicate how, when, where, and to what degree something occurs. For example, ‘γρήγορα’ means ‘quickly’, ‘ευχάριστα’ means ‘pleasantly’, and ‘ποτέ’ means ‘never’. Adverbs in Greek, as in English, are an essential part of speech to express thoughts and feelings more accurately and efficiently.