We use some adverbs to describe how frequently we do an activity.

These are called adverbs of frequency and include:

An adverb of frequency goes before a main verb (except with To Be).

An adverb of frequency goes after the verb To Be.

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.

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 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 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

https://learnenglishkids.britishcouncil.org/en/grammar-games/adverbs-frequency

Bring this worksheet in a printed version and solve it in class.