An adverb is a word that describes either a verb, an adjective, or another adverb.
Adverbs often answer questions like “How?” “Where?” “When?” or “To what degree?”

Many, but not all, adverbs end in –ly.

Here are some examples of adverbs that do not end in -ly: well, fast, hard, late, wrong, next, quite, & too.

Adverbs can be placed in many different positions in a sentence. The rules are not always absolute.

Adverbs of time often go at the beginning of a sentence, but sometimes they go at the end.

Examples:
Tomorrow, I am leaving for the Erasmus program.
Then, I will meet my new rommates at the train station.
I am leaving for the Erasmus program tomorrow. (I told you there were exceptions!)

Adverbs of frequency – always, often, usually, sometimes, rarely, seldom, and never– tend to go in the middle of the sentence, sandwiched in between the subject and the verb.

Example: I always go to sleep late on Saturday nights.

Adverbs can also go between the auxillary verb and the main verb in a negative statement like this one:

I don’t always get enough sleep on those nights.

Adverbs of certainty also go in the middle.
I will probably stay out all night.

Adverbs of manner tend to go at the end of the sentence because they tell you how the verb performed.

During his presentation, he spoke perfectly
She sang beautifully.

*Note that there are irregular adverbs formed from adjectives that do not take the -ly ending. 

Adjectives – Adverbs

Good – Well

Hard – Hard

Late – Late

Early – Early

Fast – Fast

Wrong – Wrong/Wrongly