How to Use Filler Words Naturally in English

Why you should use filler words naturally in English

Most English learners are taught that "um" and "uh" are bad habits to erase. Teachers circle them in speech feedback, learners apologise for them, and entire courses promise to "eliminate" them. The advice is backwards.

Native speakers fill their speech constantly. In casual conversation, roughly six to ten percent of spoken words are fillers or discourse markers, a pattern documented in corpus studies of spontaneous speech. A person who never uses them sounds rehearsed, robotic, or cold. Fillers are how real speakers signal that they are still thinking, still holding the floor, and still engaged.

Linguists treat fillers as a functional part of conversation, not a defect. They manage turn-taking, soften disagreement, and buy the milliseconds a speaker needs to plan the next clause. Removing them entirely does not make you fluent. It makes you sound like a textbook reading aloud.

The real skill is not avoiding fillers. It is choosing the right ones and placing them where they do useful work. That is what English speaking practice with AI rewards, because a good tutor hears the difference between a deliberate filler and a nervous stall.

The difference between a filler and a hesitation

Not all fillers are equal. The distinction that matters is between a planned filler and an unplanned stall. One sounds fluent, the other sounds lost.

A hesitation is the sound of panic: a long "uuuuh" dragged out while the speaker scrambles for the next word, often followed by silence or eye contact breaking. It tells the listener the speaker has lost the thread. A deliberate filler is short, placed at a natural pause, and immediately followed by more speech. It tells the listener "I am still talking, stay with me."

The same word can be either. "Um" said quickly at the start of a turn is a normal floor-holding signal. "Um" stretched for two seconds mid-sentence is a hesitation. What separates them is confidence and placement, not the word itself.

Researchers who study spoken corpora note that fillers serve real conversational functions, so the goal is control rather than elimination. Linguistic research on discourse markers shows they manage turn-taking and signal planning, which is why fluent speakers use them deliberately. When you can choose a filler on purpose, you have already moved past the thing that makes learners sound hesitant.

The fillers that make you sound more fluent

Not every filler carries the same weight. A small set of multi-word fillers does the heavy lifting in natural English, and they are worth learning deliberately.

"Well" softens a disagreeing or uncertain answer. "You know" invites the listener to share a reference point. "I mean" lets you correct or clarify what you just said. "Sort of" and "kind of" hedge a claim so it sounds measured rather than absolute. "Like" fills a pause in casual speech, though it reads as informal and is best avoided in interviews.

Single-syllable fillers such as "um" and "uh" are neutral. They are not wrong, but they are the ones learners overuse when nervous, which is why they get a bad reputation. The fix is not to ban them. It is to give yourself a richer set of options so you are not reaching for the same stalled sound every time.

Discourse markers sit one level above fillers. Words such as "actually", "basically", "honestly" and "right" do the same job while adding meaning. They are the bridge to sounding natural because they hold the floor and shape the sentence at the same time.

Where to place a filler in a sentence

Placement matters more than the word you choose. A filler in the wrong spot breaks the sentence; in the right spot it disappears into the rhythm.

The natural homes for a filler are at the start of a turn, before a new idea, and at a clause boundary. "Well, I think the real issue is..." uses the filler to signal a careful answer. "It was, you know, a bit more complicated than that" drops the filler into the middle where a pause would naturally fall. Both sound fluent.

What sounds wrong is a filler jammed between a verb and its object, or repeated every few words. "I went to, um, the, uh, store" is hesitation. "I went to the store, and, you know, it was closed" is a speaker managing the rhythm of the sentence.

The rule is simple: place the filler where a pause would be acceptable anyway. If a silent pause would sound natural there, a short filler will too. If a pause would sound broken, the filler will sound worse.

How to practise fillers until they sound natural

Knowing which fillers to use is not the same as using them under pressure. Fillers only sound natural when they are automatic, and the way to make them automatic is deliberate practice in real conversation.

A useful drill is to record yourself answering a simple question for one minute, then count how many times you stall. Most learners find the same stalled sound repeating. Pick one filler from the list above and consciously use it in your next three conversations. One at a time is enough; trying to adopt five at once produces exactly the cluttered speech you are trying to avoid.

Conversation practice is where this actually sticks, because fillers only make sense in the flow of a real exchange. A partner who keeps talking while you think forces you to hold the floor, which is precisely the skill fillers exist for. Tutoro gives you that exchange on demand: you talk, the tutor responds, and you learn to keep your turn alive with the same fillers a native speaker would reach for.

Tutoro runs its pronunciation and speaking work inside a live conversation with a 3D tutor who talks back, so the fillers you practise happen in the same conditions you will use them in real life. Every word you say is scored as good, fair or poor, which shows you which fillers land cleanly and which ones still sound like a stall. It is less useful if you only want to memorise lists, since the whole point is that the practice happens while you are actually talking.

When to drop the filler entirely

Fillers are a tool, not a personality. There are settings where they cost you more than they buy, and knowing the difference is part of using them well.

In a formal presentation, a job interview, or an exam speaking task, a silent pause is often stronger than a filler. A well-placed half-second of silence reads as confidence; a run of "um" and "like" reads as nerves. The best speakers in formal settings use very few fillers and let short silences do the work instead.

The distinction is the same one native speakers make without thinking. Casual speech is dense with fillers because they signal warmth and spontaneity. Formal speech is sparse because it signals control. A learner who can switch between the two registers sounds more fluent than one who fills everything or nothing.

The goal is not to sound like a native speaker at all times. It is to have the choice. When you can reach for "well" in a conversation and drop it in a presentation, you are no longer a learner managing filler words. You are a speaker using them.

Does using fillers actually improve your fluency score?

Learners preparing for IELTS or Cambridge exams often worry that any filler will lower their speaking band. The truth is more nuanced than the myth.

Examiners are trained to assess fluency and coherence, and a small number of natural fillers falls within normal speech. What is penalised is hesitation that breaks the flow: long silences, repeated false starts, and the same stalled sound over and over. A single "well" before a considered answer is not a problem; ten "ums" in a minute is.

The practical takeaway is to aim for control rather than purity. If you can replace a nervous stall with a deliberate filler, your fluency score improves, because the speech keeps flowing. If you cannot, a short silence is safer than a filler that drags.

Why "stop saying um" is bad advice

The classic instruction to "stop saying um" survives because it is easy to give and sounds like progress. It rarely works, and it often makes things worse.

Telling a learner to stop using a filler does not remove the need the filler was meeting. The speaker still needs time to think, still needs to hold the floor, still needs to soften a claim. Remove the word and the pause gets longer, or the speaker goes silent, or a new filler appears to replace the old one. The hesitation moves; it does not disappear.

What works is substitution, not suppression. Give a learner a richer set of fillers and a sense of where they belong, and the nervous "um" fades on its own because it is no longer doing all the work. The problem was never the word. It was the lack of options.

That is why the goal of this article is not to make you stop using fillers. It is to make the fillers you use sound like they belong to you.