Adverbs of Frequency

We use some adverbs to describe how frequently we do an activity.
These are called adverbs of frequency and include:
Frequency | Adverb of Frequency | Example Sentence |
100% | always | I always go to bed before 11pm. |
90% | usually | I usually have cereal for breakfast. |
80% | normally / generally | I normally go to the gym. |
70% | often* / frequently | I often surf the internet. |
50% | sometimes | I sometimes forget my wife's birthday. |
30% | occasionally | I occasionally eat junk food. |
10% | seldom | I seldom read the newspaper. |
5% | hardly ever / rarely | I hardly ever drink alcohol. |
0% | never | I never swim in the sea. |
* Some people pronounce the 'T' in often but many others do not.

The Position of the Adverb in a Sentence
An adverb of frequency goes before a main verb (except with To Be).
Subject + adverb + main verb |
I always remember to do my homework. |
He normally gets good marks in exams. |

An adverb of frequency goes after the verb To Be.
Subject + to be + adverb |
They are never pleased to see me. |
She isn't usually bad tempered. |

When we use an auxiliary verb (have, will, must, might, could, would, can, etc.), the adverb is placed between the auxiliary and the main verb. This is also true for to be.
Subject + auxiliary + adverb + main verb |
She can sometimes beat me in a race. |
I would hardly ever be unkind to someone. |
They might never see each other again. |
They could occasionally be heard laughing. |

We can also use the following adverbs at the start of a sentence:
Usually, normally, often, frequently, sometimes, occasionally
  * Occasionally, I like to eat Thai food.
BUT we cannot use the following at the beginning of a sentence:
Always, seldom, rarely, hardly, ever, never.

We use hardly ever and never with positive, not negative verbs:
  * She hardly ever comes to my parties.
  * They never say 'thank you'.
We use...