Frequency adverbs are used in a sentence to answer the question “How often?” They usually occur in different positions, but mostly in the middle of the sentence.
The adverbs with (*) may occur at the beginning or end of a sentence.
In positive sentences:
Subject + Freq Adv + Verb
He always tells the truth.
We rarely see each other.
Subject + Be + Freq Adv
The bus is always on time.
They are almost never at home
In negative sentences:
Subject + Auxiliary + Freq Adv + Verb
She doesn’t usually speak during the lesson.
They don’t frequently eat out.
I am not often sick.
Do you usually eat out?
What do you usually think when you are alone?
You should not use a negative auxiliary together with the adverbs with negative meaning.
WRONG: He doesn’t never tell a lie.
CORRECT: He never tells a lie.