There are five types of adverbs in the English language. Adverbs of frequency express how often an action takes place. The most common frequency adverbs are always, never, rarely, and usually.
Rule 1: Adverbs of indefinite frequency should be placed directly before the main verb but after the auxiliary verb.
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The only exception is the verb be. In such a case, a frequency adverb comes after.
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Rule 2: The adverbs usually, normally, often, frequently, sometimes, and occasionally can be placed at the beginning or the end of the sentence. Their placement affects the emphasis of the sentence.
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Rule 3: Adverbs of definite frequency should be placed at the end of the sentence but can also go at the beginning of it. These include today, daily, tomorrow, every week, etc.
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Quiz
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Place the adverb never in the sentence: She has driven a car.