Frequency adverbs tell how often an action happens or how regularly a state continues. They commonly modify verbs, but they can also modify clauses and sometimes whole sentences when the speaker wants to stress regularity or repetition. These words and phrases belong with Adverbs and are closely connected to Time Adverbs and Adverb Placement.

English uses single word adverbs for frequency and also uses time phrases that express regular repetition. Single word forms include always, usually, often, sometimes, rarely, seldom, and never, while phrases such as every day, once a week, and twice a month behave as time expressions. Some frequency words are more formal, especially seldom and rarely, while everyday speech often prefers simpler alternatives.

Idea	Example
Always means every time.	She always arrives early.
Usually means most of the time.	He usually studies after dinner.
Rarely means not often.	They rarely travel in winter.
Every day is a time phrase for regular repetition.	I jog every day.

With a simple verb, a frequency adverb usually comes before the main verb. With forms of be, the adverb follows the verb. With auxiliary verbs and modals, the adverb comes after the auxiliary or modal and before the main verb.

Idea	Example
A frequency adverb usually comes before a simple main verb.	She often reads at night.
A frequency adverb follows forms of be.	They are always late.
A frequency adverb follows an auxiliary verb.	She has often gone there.
A frequency adverb follows a modal verb.	He can sometimes help.

When more than one adverb appears, frequency usually comes before time or place. This order keeps the sentence clear and natural, especially when a frequency expression combines with an evening time phrase or a location phrase.

Idea	Example
Frequency comes before time.	She often works at night.
Frequency comes before place.	He usually studies at the library.
A sentence can begin with a frequency adverb for emphasis.	Sometimes, I choose the quiet route.

Degree words can strengthen frequency adverbs and make the meaning more precise. Almost always means nearly every time, very rarely means extremely infrequently, and hardly ever means almost never. Never is stronger and more absolute than hardly ever, so the two forms differ in force and emphasis.

Idea	Example
Almost always shows near total frequency.	She is almost always right.
Very rarely shows very low frequency.	We very rarely eat out.
Hardly ever is weaker than never.	He hardly ever complains.
Never expresses complete absence.	They never smoke.

The progressive with always can show irritation or repeated annoyance, not only simple frequency. In speech and writing, He is always complaining often suggests that the behavior happens again and again and that the speaker finds it frustrating. This use is common in many varieties of English, though the emotional force can vary by region and register.

Idea	Example
Always with the progressive can show annoyance.	He is always complaining.
The form can describe an irritating habit.	She is always interrupting.
The meaning can depend on speaker attitude.	They are always arriving late.

Frequency adverbs describe how often actions, habits, and states occur, while time phrases show regular repetition as scheduled intervals. Their placement changes with simple verbs, be verbs, auxiliaries, and modals, and their meaning can shift when they are strengthened by degree words or used with the progressive. Careful choice between never, hardly ever, usually, often, and phrases such as every day helps English sound accurate and natural.