Friendly, carefully, remarkably, hardly, sadly, promptly, cautiously,
Verbs cannot end in -ly. Words ending with -ly are mostly Adverbs.
correctly
friendly
Adverbs typically end in -ly such as happily, abnormally, dauntingly, or brazenly. Adverbs modify a verb, adjective or another adverb.
Most of those words will be adverbs.
yearly
zealously
dailydulyonly
xerographically
xerographically
RAM-BUNC-TIOUS-LY
Most words that end in "Ly" are usually adverbs.