Let’s look at some sample sentences:

  adjective                       adverb
 dangerous                    dangerously
  careful                         carefully
   nice                              nicely
horrible                          horribly
   easy                             easily
electronic                    electronically

Irregular forms:

   adjective                      adverb
     good                           well
     fast                            fast
     hard                           hard

If the adjective ends in -y, change -y to -i. Then add -ly:

but:

If the adjective ends in -le, the adverb ends in -ly:

If the adjective ends in -e, then add -ly:

► Not all words ending in -ly are adverbs:

There is no adverb for an adjective ending in -ly.

Good / well
'Well' can be confusing because it is both the adverb form of 'good', and an adjective that means 'healthy and fine'. 

Of course, we also use 'good' as an adjective.

Hard / hardly
'Hard' is both an adjective and an adverb.

'Hardly' is also an adverb, but it means 'almost nothing' or 'almost none'.

Late / lately
'Late' is an adjective and an adverb. There is also an adverb 'lately', which means 'recently'.

Adverbs of degree tell us more about the intensity of the verb in the sentence, in other words, they describe how much, or to what degree. They can be categorized as low degree (e.g. somewhat), medium degree (e.g. fairly), and high degree (e.g. extremely). Adverbs of degree can also modify adjectives and other adverbs and are placed before the word they modify. Popular adverbs of degree include:

Let’s look at some sample sentences:

Adverbs of frequency let us know how often the verb occurs. Therefore they mostly modify verbs. These adverbs tend to appear right before the main verb in the sentence. Popular adverbs in this category include:

Here they are in action:

Adverbs of manner tell us how, or in what manner, something was carried out. They mostly modify verbs and can often be found at the end of a clause. This category comprises the most common adverbs — the ones that end in -ly. Here are some examples of adverbs of manner:

And here are some example sentences:

Adverbs of place tell us more about where the verb took place. These tend to pop up after the main verb  or direct object of the sentence. Here are some common adverbs of place:

Let’s take a look at them in action:

Adverbs of time detail when the verb took place. We usually see these kinds of adverbs placed at the beginning or end of a sentence. Adverbs of time include:

Here they are at work:

The main types of adverbs that can be used in this position are those that:

Afterwards, we went out for a walk.

  - comment on the rest of the sentence or clause:

This term refers to adverbs that can be used in the middle of a sentence or clause. The main kinds of adverbs found in this position are those that:

He carefully avoided my eye.

The main types of adverbs which can be used at the end of a sentence of clause are those that:

Adverbs are often found between the subject and its verb:

They can also come between an auxiliary verb (such as be or have) and a main verb: