Formation of adverbs

To form French adverbs from adjectives, you often add the ending "-ment" to the feminine form of the adjective. For example, "heureux" (happy) becomes the adverb "heureusement" (happily). If the adjective ends in "-ant" or "-ent," the ending changes to "-amment" or "-emment," such as "constant" (constant) to "constamment" (constantly) and "évident" (obvious) to "évidemment" (obviously). However, there are some irregular forms that must be memorized.