Adverbs of Frequency (Always, Often, Sometimes, Never, etc.)

There was a confusion about this part of speech recently, so I'm sharing this information (from esl.about.com & english-zone.com). Hope it's helpful...

Use adverbs of frequency to say how often you do something. Adverbs of frequency are often used with the present simple because they indicate repeated or routine activities. For example, They often go out for dinner.

Adverbs of frequency include (from most often to least often):

always
usually
often
sometimes
occasionally
seldom
rarely
never

If the sentence has one verb (e.g. no auxiliary verb) put the adverb in the middle of the sentence after the subject and before the verb.

Examples

Tom usually goes to work by car.
Janet never flies. She always goes by bus.

Adverbs of frequency come after the verb 'be':

Examples

I am never late for work.
Peter is often at school.

If the sentence has more than one verb (e.g. auxiliary verb), put the adverb of frequency before the main verb.

Examples

I can never remember anything!
They have often visited Rome.

When using adverbs of frequency in the question or negative form, put the adverb of frequency before the main verb.

Examples

She doesn't often visit Europe.
Do you usually get up early?

Note: Adverbs of frequency is also known as Frequency Adverbs

Frequency Adverbs - ALWAYS / USUALLY / OFTEN, etc.

Other Verbs (play, do, study, work, etc.)	Frequency Adverbs come BEFORE other verbs.
	I always help the other students. My brother usually comes late to school. Jenny and Susan often study in the library after class.
BE Verb (am, is, are, was, were, etc.)	Frequency Adverbs come AFTER a BE verb.
	I am always a good student. My brother is usually late to school. Jenny and Susan are often in the library after class.