How to: Use adverbs
There are many different types of adverb. Many of them end with an -ly, but this is definitely not the rule: there are words that end with -ly that are not adverbs and many adverbs that do not end with -ly.
So, here are some word sets for you:
Adverbs of manner
These are the adverbs that we most obviously recognise. They are usually adjectives that have an -ly added:
accidently, angrily, anxiously, badly, boastfully, bravely, brightly, cheerfully, deliberately, dramatically, eagerly, elegantly, enormously, exactly, faithfully, foolishly, fortunately, happily, honestly, hopefully, hopelessly, irritably, jealously, kindly, lazily, obediently, obnoxiously, politely, poorly, quickly, rudely, safely, selfishly, slowly, rapidly, tediously, wearily, wildly
Adverbs of time
annually, always, eventually, finally, frequently, hourly, never, occasionally, often, rarely, regularly, seldom, soon, sometimes, today*, tomorrow*, usually, weekly, yesterday*, yet
*In "Tomorrow is Monday," then "tomorrow" is a noun. But if you say, "I'll see you tomorrow," it's an adverb.
Adverbs of degree
a bit, absolutely, almost, enough, extremely, fairly, lots, pretty (as in 'pretty happy'), quite, rather, too, very
Adverbial conjunctions (also sometimes called connectives)
and, so, but, or
additionally, also, anyway, finally, furthermore, however, in addition, instead, nevertheless, then, therefore, next, still, when whereas
-ly words that are not adverbs
* There is a mistake in the list above in that yearly can be an adverb. There are lots of words that are more than one type of speech.