Adverbs of frequency
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.
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 ever in questions and negative statements:
Have you ever been to New Zealand?
I haven't ever been to Switzerland. (The same as 'I have never been to Switzerland').
We can also use the following expressions when we want to be more specific about the frequency:
every day
once a month
twice a year
four times a day
every other week
daily
monthly
These are also known as Adverbs of DEFINITE frequency as the exact frequency is specified.
number of times + A = Time period
Once a day
Twice a week
Every + number + time period
Every two days
Every three weeks
She visits the dentist twice a year.