Began or Begun? The Past Tense of 'Begin' — and the Half That Vanishes When You Speak Fast

You're doing dictation listening practice on a short news report about a court case. The narrator drops a line, you write down "The trial has began this morning," and the red underline marks exactly one word wrong. The real sentence was "The trial has begun this morning." Another time you write "The meeting begin at nine" while the speaker actually said "The meeting began at nine," because the first syllable of the word gets compressed down to a faint b sound and you don't catch the vowel that follows in time. Quick answer first: the simple past of begin is began, and the past participle of begin is begun. The V-ing form is beginning with two n's, the third-person singular is begins.

That's the easy part, and every other site has it too. The hard part is in two places. First, begin is a two-syllable verb with stress on the second syllable, so the first syllable gets nearly swallowed whole in fast speech and you usually only catch half the word. Second, begin shares turf with start — the two words can substitute for each other in a lot of places but not in a few important ones, and no book bothers to spell those out clearly.

This article goes through the whole chain: the form table for begin, the i-a-u vowel axis it shares with sing and drink, the double-n rule in beginning, choosing began versus begun based on where it sits in the sentence, the boundary between begin and start, common collocations, and the part that actually matters for listening practice — how these two forms actually sound when a native speaker says them at normal speed.

• The form table for begin, and why beginning has two n's
• When to use began, when to use begun, and where begin differs from start
• Hearing began and begun in real speech
• Common collocations with began and begun
• Mistakes Vietnamese speakers often make with begin
• Quick exercise
• Frequently asked questions

The form table for begin, and why beginning has two n's

Five forms, fit into one table. The phonetic transcription column follows American pronunciation, the stress mark before a syllable shows where the stress falls, and for this verb the stress is always on the second syllable.

Form	Word	Transcription	Short example
Base form (V1)	begin	/bɪˈɡɪn/	We begin at nine.
Third-person singular	begins	/bɪˈɡɪnz/	The course begins today.
Simple past (V2)	began	/bɪˈɡæn/	The film began late.
Past participle (V3)	begun	/bɪˈɡʌn/	It has begun already.
Present participle	beginning	/bɪˈɡɪnɪŋ/	They are beginning now.

Look at the three main forms and you'll see the be- part at the front and the -n at the end never change. All the conjugation work lands on the vowel in the middle of the second syllable: i becomes a becomes u. This kind of change is called ablaut — changing the vowel inside the word stem instead of tacking on an ending — and begin runs on the same axis as sing, sang, sung, as ring, rang, rung, as swim, swam, swum, and as drink, drank, drunk.

But begin has one feature that sets it apart within that group. Those other words are all one syllable, so the vowel that changes with tense is the word's only vowel, and it's always clearly stressed. begin has two syllables, and luckily the stress falls right on the syllable holding the tense-marking vowel. That means, in theory, you get the clue at the strongest point of the word. What gets sacrificed is the first syllable — it shrinks down to a very faint sound.

The doubled n in beginning isn't some arbitrary exception — it follows a clear rule. When a two-syllable verb has stress on the final syllable, and that final syllable ends in a single consonant after a single vowel, the final consonant gets doubled before adding -ing or -ed. begin becomes beginning, prefer becomes preferred, admit becomes admitted, permit becomes permitting. By contrast, visit and open have stress on the first syllable, so no doubling: visiting, opening.

This rule also explains why the spelling begining with one n is wrong, and why it's such a common mistake: your eyes see begin with one n, so your hand just tacks on -ing and calls it done, while the stress pattern demands the doubling.

Three verbs worth looking at alongside begin, since each one highlights a different angle: the past tense of sing follows the same i-a-u axis but is only one syllable so the vowel comes through far more clearly, the past tense of swim has swum as a form that shows up so rarely in conversation that your ear lacks enough samples to compare against, and the past tense of start is a regular verb and also happens to be the word learners tend to substitute for begin. The English grammar article is the bigger map, where you can see where this verb sits among the tenses.

When to use began, when to use begun, and where begin differs from start

The shortest rule: began stands alone, begun never stands alone. began is the simple past — it works as the sentence's main verb by itself. begun is a participle — it always needs have, has, or had in front of it, or a form of be if the sentence is passive.

Sentence	Correct or wrong	Why
The course began in March.	Correct	Simple past, with a closed time marker
The course has began already.	Wrong	After has must come the participle begun
Talks have begun between the two sides.	Correct	Participle after have, the action is still ongoing
The film begun at eight.	Wrong	begun is missing the auxiliary verb before it
Work had begun before the permit arrived.	Correct	Past perfect, begun after had
Did the meeting began on time?	Wrong	After did comes the base form, it should be begin

There's one detail about frequency worth knowing. With begin, the form begun shows up unusually often in the news, because news reports tend to talk about something that has just started and is still ongoing: "the trial has begun," "construction has begun," "talks have begun." If you listen to news podcasts, begun will reach your ears more often than began.

The part that really trips up Vietnamese speakers isn't began versus begun — it's choosing between begin and start. Vietnamese lumps both into the single word bắt đầu, while English splits them along two axes: one is level of formality, the other is the kind of thing being talked about.

Sentence	Real meaning and why that word is used
The ceremony began at ten.	begin is more formal, fits an event with a schedule
The car would not start.	For machinery only start is used, never begin
She started a small business in 2020.	For setting something up, start is used
He began his speech with a joke.	Opening a speech, begin sounds more natural
To begin with, the numbers do not add up.	Fixed phrase meaning first of all, firstly
It began to rain, or It began raining.	After begin, both to V and V-ing work

The second row is the clearest and also the easiest boundary to remember: anything with an engine takes start, not begin. You start the car, start the engine, start the machine. On the other hand, a ceremony, a trial, a speech — begin sounds more formal and natural there, though start still works too.

So when do you choose began over has begun? When the sentence has a closed time marker: in March, last week, at ten, two years ago. A marker present means use began. No marker, and you're talking about something that just kicked off and is still running up to now, means use has begun or have begun.

Hearing began and begun in real speech

This is the part you won't find in a verb conjugation table, and for a two-syllable verb it has its own particular kind of difficulty. With sing or drink, the whole word gets stressed, so you hear it in full. With begin, half the word gets compressed down to almost nothing, and that half happens to be the one that comes first.

The first syllable shrinks down to a faint b sound. The vowel in be within begin isn't stressed, so it collapses into a schwa, sometimes disappearing entirely. "It began" comes out as "it b'gan," "has begun" comes out as "haz b'gun." If your ear is waiting to hear two full syllables, you'll miss the word right from the start.

The distinguishing vowel sits on the stressed syllable — that's the one advantage here. Unlike travelled or beaten, the part of begin that carries the information lands right on the word's strong point. That means if you catch the second half, you can tell began apart from begun. The thing to train is anchoring onto the second half instead of straining to catch the beginning of the word.

The /æ/ sound in began gets raised before the letter n. In American speech, this vowel before a nasal sound is typically pulled up and given a glide tail, so began comes out close to "bee-gayn" rather than a flat a sound. Learners waiting for the Vietnamese a sound hear it as a different word entirely.

The /ʌ/ vowel in begun is the most neutral sound in English. It sits very close to schwa, so when a sentence runs fast, begun can come out almost like "b'g'n," two blurred syllables running together. This is why begun so often gets transcribed as began or as begin.

has and have before begun are nearly invisible. "The trial has begun" in real speech becomes "the trial's begun," and the 's is reduced to a single hissing sound stuck to the end of the subject. Missing that piece leads to transcribing it as "the trial begun," a grammatically wrong sentence, or as "the trial began," a grammatically correct sentence with the wrong meaning.

beginning shortens the -ing ending to -in. In relaxed speech, "at the beginning of the year" becomes one block, "at thuh b'ginnin-uv thuh year," and the boundaries between words disappear. This is also where many people write begining with a single n, because the sound gives no clue that the n is doubled.

The table below places the same sentence in three states: written, spoken aloud, and mistranscribed. The middle column records exactly what reaches the ear, not textbook phonetic transcription.

Actual sentence	Heard as	Learners often write it as
The meeting began at nine sharp.	thuh meedin b'gan at nain sharp	The meeting begin at nine sharp.
The trial has begun in Hanoi.	thuh trai-ulz b'gun in hanoi	The trial began in Hanoi.
It had already begun when we arrived.	it-ud olreddy b'gun wen wi...	It had already began when we arrived.
We began with the numbers.	wi b'gan with thuh nummers	We begin with the numbers.
Prices have begun to fall again.	praisiz-uv b'gun tuh fol...	Prices began to fall again.
At the beginning of the year.	at thuh b'ginnin-uv thuh yeer	At the begining of the year.

Looking at the third column, the errors fall into three clear types. begin instead of began is a vowel error on the stressed syllable, but that vowel is short so it still slips through. began instead of has begun is an error involving an unstressed function word, where has gets swallowed and the tense of the whole sentence changes. begining instead of beginning is a spelling error that originates in the ear: the sound gives no indication of whether the n is doubled, so only the stress rule can save you.

That pattern shows up very clearly in a dictation session on WELE. After you listen to a sentence, you transcribe it as is, and the grading pinpoints exactly the word that's off. When the flagged word is begun but you wrote began, you get a piece of information that reading a verb conjugation table never gives you: you heard the vowel, but you haven't yet separated /æ/ from /ʌ/ in a stressed position. You listen to that same sentence again, this time knowing exactly where to focus.

With begin there's an extra advantage that few other verbs have. Because it appears so densely in news podcasts, you don't have to go hunting for example sentences. Just transcribe a few short news segments and you'll run into began, has begun, had begun and beginning all in the same session, and your ear gets to compare all four forms side by side instead of memorizing four rows in a table.

If you want to understand why unstressed syllables get compressed rather than assume you're just bad at listening, the article on connected speech explains the mechanism behind reduction and linking across a whole sentence, not just begin. If you want to practice on real voices, the podcasts in the library all come with transcripts to check yourself against.

Common phrases with began and begun

begin produces almost no phrasal verbs, quite unlike go or cut. To make up for it, it appears in many fixed expressions in formal and journalistic English, and that's where you'll run into it most. The thirteen rows below are the most heavily used phrases, written in the past or participle form so you get used to seeing them that way.

Phrase	Meaning	Example
begin with	To start with something	The report began with a short summary.
to begin with	First of all, in the first place	To begin with, the deadline was never realistic.
begin by doing	To open by doing something	She began by thanking the whole team.
begin as	To have originally started out as something	The company began as a two-person office.
begin to do something	To start doing something	Prices have begun to fall again.
begin doing something	To start doing something, nearly the same meaning as above	He began working there in 2018.
work has begun on	Construction has started on something	Work has begun on the new bridge.
talks have begun	Negotiations have opened	Talks have begun between the two sides.
begin a career	To start a career	She began her career as a translator.
begin again, begin from scratch	To start over from the beginning	They deleted the file and began again.
the beginning of the end	A sign marking the start of an ending	That quarter was the beginning of the end.
from beginning to end	From start to finish	I read it from beginning to end in one sitting.
charity begins at home	Take care of your own people first	He shrugged and said charity begins at home.

Two rows worth pausing on are to begin with and begin as. to begin with isn't about the time something starts, it's a way of opening a list of reasons, equivalent to "first of all." begin as comes up very often in writing about companies and careers, and it always carries an implied contrast with the present: "the company began as a two-person office" implies it's much bigger now.

Also notice how a change in form changes the sense of time in the work has begun on row. "Work began on the bridge in 2021" places the event at a closed-off point, like a historical record. "Work has begun on the bridge" says the site is active right now. When listening, the distinguishing signal is exactly the reduced has at the front, which is precisely the part most likely to disappear in fast speech.

Mistakes Vietnamese learners commonly make with begin

beginned. This mistake comes from the reflex of attaching -ed to every verb. begin is an irregular verb in the i-a-u vowel-change group, and it never takes an -ed ending. Only began and begun exist.

has began. This is the single most common mistake on this whole page, and it's common precisely because began sounds more familiar to the ear. After have, has, had, it must be begun. "The class has begun" is correct, "the class has began" is wrong, with no exceptions.

Did you began. Did has already carried the past tense, so the verb after it reverts to the base form. "Did the meeting begin on time?" is correct. This mistake tends to show up right when you're concentrating hard on remembering that the past tense of begin is began, and remembering it too well.

Writing begining with one n. The stress of begin falls on the final syllable, so the n must be doubled before -ing: beginning. The same rule applies to preferred, admitted, permitting. This isn't a grammar mistake but a spelling mistake, and it costs points in writing.

Using begin for machines. "The car did not begin" is not something a native speaker would say. For engines, devices, computers, always use start: "the car would not start," "start the engine," "start the computer." begin is for events, processes, talks, stages.

Confusing begin with beginning as a noun. begin is only a verb. The noun is beginning. The sentence "in the begin of the year" is wrong; it must be "at the beginning of the year." Also pay attention to the preposition: at the beginning of is used for a point in time, while in the beginning means "at first," when telling a story.

Quick exercise

Eight sentences. Fill in begin, begins, began, begun, or beginning. Do all of them before looking at the answers below.

1. The ceremony ______ at ten and finished at noon.
2. Talks have ______ between the two companies.
3. Did the film ______ before you got there?
4. The new term ______ next Monday.
5. By the time we sat down, the play had already ______.
6. She ______ her career as a translator in Hue.
7. At the ______ of the year we had only three staff.
8. Prices have ______ to fall for the first time this year.

Answers: 1. began. 2. begun. 3. begin. 4. begins. 5. begun. 6. began. 7. beginning. 8. begun.

There are two sentences worth a second look: sentence 3 and sentence 4. Sentence 3 has did before it, so the verb goes back to the base form — this is where most learners fill in began because the sentence talks about the past. Sentence 4 has next Monday, so it's the simple present used for future schedules, and the subject is singular so it needs an s. If you got these two wrong, the middle part of the article is worth reading again.

Frequently Asked Questions

What is the past tense of begin?

The simple past of begin is began, the past participle is begun. These two forms cannot be swapped for each other: began acts as the main verb in a simple past sentence, while begun always follows have, has, had, or a form of be.

Began or begun, which one do you use?

Look at what comes before it. If there's have, has, had, use begun. If nothing comes before it, use began. "The class began at nine" is correct, "The class has begun" is correct, "The class has began" is wrong, "The class begun" is wrong.

Why does beginning have two n's?

Because the stress in begin falls on the last syllable, and the spelling rule says that a two-syllable verb stressed on the last syllable, ending in a single consonant after a single vowel, doubles that consonant before adding -ing or -ed. Same rule for preferred and admitted.

How are begin and start different?

In most cases they can be swapped for each other, begin is just a touch more formal. The clearest dividing line is machinery: you start the car, start the engine, and never begin them. On the other hand, for a ceremony or a speech, begin sounds more natural.

Begin to do or begin doing?

Both are correct and mean almost the same thing. "It began to rain" and "It began raining" are both natural. There is just one thing to avoid: stacking two -ing forms next to each other, so "it is beginning to rain" sounds better than "it is beginning raining".

Can't tell began from begun by ear? How do you train for it?

Hold on to the second half of the word, since that's where the stress falls and also where the distinguishing vowel sits. An effective way to train is to transcribe short news bulletins, where both forms turn up thickly within the same passage. The listening level test gives you a starting point, and the next time you measure yourself you'll have something to compare against.

You can read through the table of begin's forms in thirty seconds, and that's the easiest part of this page. The rest of it — the way the first half of the word gets compressed away and has dissolves into the subject — only truly sinks into your ear once you mishear it and then see where you transcribed it wrong. Pick a short news bulletin and try listening dictation practice on a passage with began or has begun, then go back to the table at the top of the article and see if it still looks dry to you.