Adverbs are classified according to the circumstances or ideas they express: time, intensity, place, mode, affirmation, negation and doubt.

adverb of time
still, now, tomorrow, night, day before yesterday, before, in the afternoon, sometimes, currently, soon, early, after, in the morning, of suddenly, from time to time, today, nowadays, already, never, soon, never, yesterday, now, once, when, always, late.
Examples:
- We speak tomorrow.
- Never say that.
- It's late.
adverb of intensity
only, rather, quite, well, too much, too little, at all, indeed, more, badly, less, much, little, how much, how, almost, so, so.
Examples:
- Write well.
- Talks little.
- His voice is barely audible.
Adverb of place
below, above, there, ahead, to the right, to the left, there, beyond, somewhere, there, to the side, below, here, behind, through, here, above, outside, front, inside, behind, above, outside, there, far, where, near, by outside.
Examples:
- I am here.
- Hang the rightmost frame.
- Look behind you.
Mode adverb
so, aimlessly, openly, hastily, aimlessly, at ease, well, with rancor, vainly, squatting, coloring, softly, quickly, slowly, silently, face to face, face to face, bad, better, worse, without fear.
Add most of the words ending in to the list. -mind: cheerfully, kindly, calmly, discreetly, elegantly.
Examples:
- I do it like this.
- Feel free.
- Better talk to him.
affirmation adverb
certainly, certainly, certainly, effectively, certainly, really, surely, without a doubt, yes.
Examples:
- Yes, I'm leaving.
- She really needed help.
- Without a doubt he is the best speaker.
Adverb of negation
not at all, not at all, not at all, no, either.
Examples:
- There's no way we're leaving you alone.
- I won't, period.
- Students don't listen to teachers either.
adverb of doubt
chance, eventually, maybe, possibly, probably, maybe, maybe.
Examples:
- Did I say you could leave?
- Opponents will likely win the game.
- They said maybe they would come.
These are the types of adverbs according to Brazilian Grammar. Portuguese Grammar, in turn, admits three more adverbs:
- order adverb: later, first, lately
- Exclusion adverb: only, saved, if not, only, only.
- Designation Adverb: behold.
Besides them, we call interrogative adverbs the words how, where, where, whence, why, when. These words can be used in direct or indirect interrogative sentences.
Examples:
- How do I do this?
- I want to know how I should do this.
- Where are you?
- I wonder where you are.
- Where will we go?
- I wonder where we are going.
- Where does this letter come from?
- I would like to know where this letter comes from.
- Why are you here now?
- I want you to explain why you arrived now.
- When can we meet?
- I wonder when we can meet.
Read too:
- Adverb
- Adverb degree inflections
- Adverbial Adjunct
- Exercises on adverbial adjunct
- adverbial phrase
- adverbs in english
- Welcome, Welcome, Welcome or Welcome?