2. Adverb: modifies a verb, an adjective, or another adverb

3. ADVERBS THAT MODIFY VERBS Answers the question: when, where, how, how often, etc. Can be moved around in the sentence

4. The Adverb Question Test:
If a word answers an adverb question (when where, how, how often, etc.) then the word must be an adverb that modifies the verb.
Time: They unloaded the truck yesterday.
Adverb Question: When did they unload the truck?
Adverb Answer: Yesterday.

5. They parked the truck there. Where did they park the truck? There.
They parked the truck carefully. How did they park the truck? Carefully.
They use the truck occasionally. How often do they use the truck? Occasionally.

6. The Adverb Movement Test:
If a word can be moved to a different position in the sentence, then the word must be an adverb that modifies the verb.
Toto chases cats frequently.
Toto frequently chases cats.
Frequently, Toto chases cats.

7. ADVERBS THAT MODIFY ADJECTIVES
a completely false idea
a very accurate guess
some rather unusual performances
some quite dangerous weapons
the terribly hot afternoon
some unusually good results

8. my extremely fast, very beautiful horse my horse
The Adverb Pair Test:
If a word in a noun phrase CANNOT be paired up with the noun, then that word is an adverb modifying an adjective.
my extremely fast, very beautiful horse
my horse
extremely horse  extremely fast
fast horse
very horse  very beautiful
beautiful horse

9. ADVERBS THAT MODIFY ADVERBS
Always reveal how something was done and come immediately before another adverb
They always answer their mail very promptly.
He ran the race so quickly!
I called you too late, didn’t I?