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Regular vs. Irregular Verbs

As if learning 50 conjugations of each verb wasn’t enough, we also have to watch out for the dreaded irregular verbs! 🙈  In previous lessons, you learned the verb serto be - permanent , one of the most common irregular verbs in Portuguese.
But why is it called “irregular”?
Well, verbs are irregular when they don’t follow the same conjugation patterns as regular verbs. If it were regular, it would be ❌ Eu so, Tu ses, Ele se, Nós semos, Vocês sem, etc., but instead it’s:

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Elas são primasThey are cousins fem.

English also has irregular verbs, including “to be”. You can say I walk, you walk, she walks, but you can’t say I be, You be, She bes. The correct conjugations just have to be memorized for irregular verbs.
To make sure you’re ready to face more verbs in the coming lessons, let’s get a bit more familiar with irregular verbs in Portuguese.
Hang on to your hats! 🎩👒

Irregular Verbs in Portuguese

As a reminder, when you conjugate a regular verb, you take the root (which doesn’t change) and you add an ending, which varies according to the subject, number, and tense. The rules for these endings are consistent for each set of regular verbs (i.e. depending on whether the infinitive form of the verb ends in -ar, -er, or -ir).
With irregular verbs, it’s more complicated. Some irregular verbs present changes in the root, others in the ending, and others in both.

Examples of changes in the root:

Examples of changes in the ending:

Examples of changes in both:

  • fazerto do, to make eu façoI doindicativo > presente   (instead of “Eu fazo”)
  • saberto know Eu seiI knowindicativo > presente   (instead of “Eu sabo”)

How can you tell whether a verb is regular or irregular?

Unfortunately, there’s no easy way to know if a verb is regular or not just by looking at the infinitive form. You just have to memorize them over time. Que confusão!What a mess!
One quick tip is that most irregular verbs end in -ir or -er. There are only a handful of -ar verbs that are irregular
But don’t worry, in the Verbs section, members can filter by the irregular tag to quickly find and practice the irregular conjugations.
Here are some of the most common verbs that include irregular conjugations:
serto be - permanent | irto go | virto come terto have estarto be | darto give | saberto know | fazerto do | quererto want | poderto be able to | dizerto tell
Being classified as irregular doesn’t necessarily mean that the entire conjugation is irregular. Some verbs are only slightly different. It could be irregular in one tense (i.e. present tense) but regular in another, or sometimes only part of a tense is affected. For example, here are 2 verbs that have regular present tense endings for everything except the eu form:

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Ela ouve o seu cãoShe hears her dog

    eu ouçoi hearindicativo > presente tu ouvesYou sing.,inf. listenindicativo > presente ele / ela ouveHe / She hearsindicativo > presente você ouveyou hearindicativo > presente nós ouvimoswe hearindicativo > presente eles / elas ouvemthey hearindicativo > presente vocês ouvemyou hearindicativo > presente

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Nós damos-vos tudo o que vocês pedemWe give you pl. everything you ask for

    eu peçoi ask forindicativo > presente tu pedesYou sing.,inf. ask forindicativo > presente ele / ela pedeHe / She asks forindicativo > presente você pedeyou ask forindicativo > presente nós pedimoswe ask forindicativo > presente eles / elas pedemthey ask forindicativo > presente vocês pedemyou ask forindicativo > presente

A Comparison

Here’s a regular -AR verb,  falar:

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Nós falamos ao telefoneWe talk on the phone

And here’s an example of one of the most common irregular -AR verbs in Portuguese, estar:

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Você está em terceiro lugarYousing.,formal are in third place

    eu estoui amindicativo > presente tu estásYou sing.,inf. areindicativo > presente ele / ela estáHe / She isindicativo > presente você estáyou areindicativo > presente nós estamoswe areindicativo > presente eles / elas estãothey areindicativo > presente vocês estãoyou areindicativo > presente

To compare the present tense endings:

  • regular -AR verbs: -o, -as, -a, -amos, -am
  • estar: –ou, –ás, –á, –amos, –ão

Extra Tips

As you start memorizing more and more irregular verbs in Portuguese, you may start to notice some similarities. For example, although the verb darto give is also irregular, it happens to be conjugated with the same endings as estarto be - temporary (above).

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Eles dão uma prendaThey give a present

    eu doui giveindicativo > presente tu dásYou sing.,inf. giveindicativo > presente ele / ela He / She givesindicativo > presente você you giveindicativo > presente nós damoswe giveindicativo > presente eles / elas dãothey giveindicativo > presente vocês dãoyou giveindicativo > presente

There are also some patterns within certain tenses of verbs that end in the same way, such as -iar and -ear, –uir, and -zir.
In other words, it’s not all completely random, so you will come across regularity within the irregularity. But it’s quite inconsistent, so trying to memorize these additional patterns and exceptions in advance is typically much more overwhelming than helpful.
As you continue to learn more verbs and verb tenses, you’ll also find out that some verbs have spelling variations, even though they are considered “regular”. For example, chegar is a regular verb, but it becomes eu cheguei in the simple past tense, instead of eu chegei. In other words, it’s phonetically regular (no change in how it sounds), so the u just helps it match the spelling for that particular sound in Portuguese..

Other Common Irregular Portuguese Verbs

Here are a few more present tense conjugations for some common irregular Portuguese verbs:

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Vocês podem pagar o jantar?Can youpl. pay for the dinner?

    eu possoi canindicativo > presente tu podesYou sing.,inf. canindicativo > presente ele / ela podeHe / She canindicativo > presente você podeyou canindicativo > presente nós podemoswe canindicativo > presente eles / elas podemthey canindicativo > presente vocês podemyou canindicativo > presente

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Nós queremos uma casa com varandaWe want a house with a balcony

    eu queroi wantindicativo > presente tu queresYou sing.,inf. wantindicativo > presente ele / ela querHe / She wantsindicativo > presente você queryou wantindicativo > presente nós queremoswe wantindicativo > presente eles / elas queremthey wantindicativo > presente vocês queremyou wantindicativo > presente

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Tu dizes a verdadeYousing.,inf. tell the truth

    eu digoi sayindicativo > presente tu dizesYou sing.,inf. sayindicativo > presente ele / ela dizHe / She saysindicativo > presente você dizyou sayindicativo > presente nós dizemoswe sayindicativo > presente eles / elas dizemthey sayindicativo > presente vocês dizemyou sayindicativo > presente

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Eu tenho sacos, por isso eu vou de elevadorI have bags, so I will take the elevator

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Ela faz o almoçoShe makes lunch

    eu façoi doindicativo > presente tu fazesYou sing.,inf. doindicativo > presente ele / ela fazHe / She doesindicativo > presente você fazyou doindicativo > presente nós fazemoswe doindicativo > presente eles / elas fazemthey doindicativo > presente vocês fazemyou doindicativo > presente

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Que filme é que vocês vão ver?What movie are youpl. going to watch?

    eu voui goindicativo > presente tu vaisYou sing.,inf. goindicativo > presente ele / ela vaiHe / She goesindicativo > presente você vaiyou goindicativo > presente nós vamoswe goindicativo > presente eles / elas vãothey goconjuntivo > presente vocês vãoyou goconjuntivo > presente

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Ele o que se passaHe sees what's going on

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Tu vens comigo?Are yousing.,inf. coming with me?

    eu venhoi comeindicativo > presente tu vensYou sing.,inf. comeindicativo > presente ele / ela vemHe / She comesindicativo > presente você vemyou comeindicativo > presente nós vimoswe comeindicativo > presente eles / elas vêmthey comeindicativo > presente vocês vêmyou comeindicativo > presente

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Vocês odeiam aviõesYou pl. hate planes

    eu odeioi hateindicativo > presente tu odeiasYou sing.,inf. hateindicativo > presente ele / ela odeiaHe / She hatesindicativo > presente você odeiayou hateindicativo > presente nós odiamoswe hateindicativo > presente eles / elas odeiamthey hateindicativo > presente vocês odeiamyou hateindicativo > presente

Help! 😧

Remember, this takes time. Along the way, you can reference our Verbs section for help with conjugating both regular and irregular verbs in different tenses! Phew! 😌

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