Indonesian grammar: the complete overview

Indonesian grammar fits on one page because it threw away most of what you are bracing for. No conjugation, no gender, no cases, no articles, no agreement, no tones.

What is left is a small set of rules that never break, and one system that takes real work. This page is all of it, in the order it becomes useful, with what changes the moment people stop reading from a book.

What Indonesian does not have

Not “fewer forms”. None.

No verb conjugation. Makan is I eat, he eats, they ate, she has eaten, we will eat. The verb never changes for person or time.

No grammatical gender. No masculine tables. There is not even a separate word for he and she: dia is both.

No articles. Buku is book, a book and the book.

No plural agreement. Tiga buku, three book. The number already said it.

No case. Nouns do not change shape according to their job in the sentence.

No copula in the present. Saya guru is “I am a teacher”, with nothing between the two words. The ini and itu lesson covers the sentences where English needs “is” and Indonesian does not.

That list is why a country of seven hundred languages could agree to share this one.

Word order, and the one rule that never breaks

Sentences are subject, verb, object, the order you would guess.

Saya minum kopi ‘I drink coffee’
Dia membaca buku ‘He reads a book’

Inside a noun phrase, the order flips relative to English: the main noun comes first, the word that describes it comes second.

rumah besar ‘big house’, literally house-big
rumah saya ‘my house’, literally house-me
buah naga ‘dragon fruit’, literally fruit-dragon
orang Indonesia ‘an Indonesian person’

That single pattern covers adjectives, owners, and compound nouns at once. Get it wrong and you say besar rumah, which is not a phrase.

Nouns, plurals, and when to bother

Plural by saying it twice:

buku ‘book’ → buku-buku ‘books’

And most of the time you do not bother, because a number or a quantity word has already done the work. Banyak buku, many book. Tiga anak, three child. Doubling on top of that is wrong, not optional. The plurals lesson is one of the shortest on the site for that reason.

Classifiers, because counting needs a helper

Between a number and a noun, Indonesian inserts a word that sorts the thing being counted. English does this for uncountables, two sheets of paper, and Indonesian does it for everything.

tiga orang guru ‘three teachers’, with orang ‘person’ for people
dua ekor kucing ‘two cats’, with ekor ‘tail’ for animals
lima buah rumah ‘five houses’, with buah ‘fruit’ for objects

In casual speech people drop them constantly, so treat them as something to recognise before something to produce. The classifiers lesson has the full set worth knowing, which is about six.

Pronouns, and why choosing one is a social act

This is where Indonesian asks more of you than European languages do, and it is not about grammar.

Two things to take from that table.

The we split. Kita includes the person you are talking to, kami excludes them. Getting it backwards tells someone they are not invited, which is the subject of the kita against kami lesson.

There is no neutral choice. Every sentence you speak picks a register, whether you meant to or not. Saya is safe with strangers and stiff with friends; aku is warm and wrong in an office; gue is Jakarta and sounds like costume on a foreigner outside it. That is what the saya against aku lesson is for, and it matters more than any rule on this page.

In practice, pronouns often disappear entirely, replaced by names or titles. Someone will say Pak Budi mau ke mana? to your face, meaning “where are you going”, because Pak and Bu are politer than any word for you.

Possession: the owner comes second

rumah saya ‘my house’
mobil Budi ‘Budi’s car’

Then the same thing again as suffixes, which is what you will actually hear:

rumahku ‘my house’
rumahmu ‘your house’
rumahnya ’his, her, its house, and also just “the house”*

That last one does a lot of work. -nya marks possession, definiteness, and sometimes just softens a noun. The possessives lesson separates the three uses.

Adjectives, and how to compare

Adjectives follow the noun, and there is no “to be” in front of them.

Rumah itu besar ‘That house is big’

Comparison is three words and no endings:

lebih besar ‘bigger’
lebih besar daripada ‘bigger than’
paling besar or terbesar ‘biggest’
sama besarnya ‘the same size’

No -er, no -est, no irregular forms to memorise. The comparatives lesson covers the one trap, which is daripada against plain dari.

Verbs never change shape

Whatever else happens, the verb itself is fixed. Makan stays makan for every person, every number, every time. What changes is what you put around it, and that is the next two sections.

Tense without tenses

Indonesian marks time with a handful of words placed before the verb, and then stops thinking about it.

Saya sudah makan ‘I have eaten’ or ‘I already ate’
Saya sedang makan ‘I am eating right now’
Saya akan makan ‘I will eat’
Saya belum makan ‘I have not eaten yet’
Saya masih makan ‘I am still eating’
Saya pernah makan ‘I have eaten before, at some point’

That is the entire tense system, and you have just read it. Two notes that matter more than they look. Belum is not the same as tidak: it means not yet, and Indonesians use it where English would flatly say no, because it leaves the door open. And sedang becomes lagi in speech, every time.

Details in tenses, sudah, belum and masih, and pernah.

Negation: two words for no, and three more

The rule that decides everything: tidak negates verbs and adjectives, bukan negates nouns.

Saya tidak makan ‘I do not eat’
Saya bukan guru ‘I am not a teacher’

Get that backwards and you sound like week one, which is why it has its own lesson. Then three more:

belum ‘not yet’, the soft no
jangan ‘do not’, for orders
tanpa ‘without’

And in real speech tidak is almost never said. It is nggak, or gak, or enggak, and in Jakarta among friends it collapses further. Every course teaches tidak and stops there.

Questions

Two ways, and the easy one is the common one.

Change nothing and raise your voice. Kamu mau kopi? is a question by intonation alone.

Or use a question word, which stays where the answer would go rather than jumping to the front:

Kamu tinggal di mana? ‘Where do you live’, literally you live where
Ini apa? ‘What is this’
Harganya berapa? ‘How much is it’

The textbook apakah exists, marks a yes-no question, and is optional to the point of being rare in speech. The full set is in question words, and the reasons apakah keeps appearing in your app are in yes and no.

The affix system, which is the whole game

Here is the one hard thing. A single root grows into a family of words through prefixes, suffixes and both at once, and this is what makes written Indonesian look impenetrable when the spoken version felt easy.

Take ajar ‘teach’:

belajar ‘to study’
mengajar ‘to teach’
mengajarkan ‘to teach something’
pengajar ‘a teacher, the one who teaches’
pelajar ‘a student’
pelajaran ‘a lesson’
pembelajaran ‘the process of learning’

Seven words, one root. Learn the machine and you stop memorising the outputs. The affix overview is the place to start.

me-, and the letters that vanish

me- makes an active verb, and it changes shape to match the sound after it. Written meN- in grammars, where N is a nasal that assimilates. Six forms:

baca → membaca, the b survives
potong → mem**otong, the p is gone
tulis → men**ulis, the t is gone
kirim → meng**irim, the k is gone
sapu → meny**apu, the s is gone
cat → menge**cat, because cat is one syllable

The pattern underneath: p, t, k and s disappear, their voiced partners b, d, g and j survive. Six rules, no exceptions worth worrying about in your first year. More in the me- lesson.

The other affixes, in one place

ber- makes an intransitive verb, often “to have” or “to be in a state”: berbicara ‘to speak’, berwarna ‘to have a colour’. See ber-.

di- makes the passive: dibaca ‘is read’. See the di- passive.

ter- marks what happened without anyone deciding it, and sometimes the superlative: tertidur ‘fell asleep’, terbesar ‘biggest’. See ter-.

pe- makes the doer: pekerja ‘worker’, penulis ‘writer’. It mutates exactly like me-.

-kan points the verb at a thing, often causative: besar ‘big’ → membesarkan ‘to enlarge’.

-i points the verb at a person or a place: menanyai ‘to question someone’.

-an turns things into other things: makan ‘eat’ → makanan ‘food’, minum → minuman.

ke-…-an wraps an adjective into an abstract noun: aman ‘safe’ → keamanan ‘security’. Most of the serious vocabulary in a newspaper is built this way.

The passive, and why Indonesian reaches for it constantly

English avoids the passive. Indonesian prefers it, and there are two.

Type one, with di-. Used when the agent is a third person, a name, or absent.

Surat itu dikirim ‘The letter was sent’
Surat itu dikirim oleh Budi ‘The letter was sent by Budi’

Type two, and this one surprises people. When the agent is I or you, the di- form is not used. The pronoun goes straight in front of the bare root, with no prefix at all.

Buku itu saya baca ‘I read that book’
Surat itu kamu tulis ‘You wrote that letter’

Not dibaca oleh saya, and not saya membaca either in this construction. Nothing may come between the pronoun and the root. It looks like a mistake to an English speaker and it is the standard pattern.

There is a third thing worth naming, the adversative ke-…-an, which reports something unpleasant happening to you:

Saya kehujanan ‘I got caught in the rain’
Dia kecurian sepeda ‘He had his bicycle stolen’

Compare sepedanya dicuri, “his bicycle was stolen”, which reports the event. Kecurian reports the victim.

Yang, the word that does the most work

Yang turns anything that follows it into a description of what came before. It is the closest thing Indonesian has to who, which and that, and it is everywhere.

orang yang tinggal di sini ‘the person who lives here’
buku yang saya baca ‘the book that I read’
yang merah ‘the red one’

That last use is the one to steal. Point at a market stall, say yang itu, and you have a complete sentence. Its own lesson has more.

Prepositions and conjunctions

Three prepositions do most of the work, and they map onto movement:

di ‘at, in’, standing still
ke ‘to’, moving towards
dari ‘from’, moving away

Saya di Jakarta, saya ke Jakarta, saya dari Jakarta. See di, ke and dari. Then pada for people and points in time, dengan ‘with’, untuk ‘for’, oleh ‘by’.

Conjunctions are as plain: dan ‘and’, tapi ‘but’, atau ‘or’, karena ‘because’, jadi ‘so’, kalau ‘if’, supaya ‘so that’. Each has a lesson, starting with conjunctions and kalau.

Reduplication that is not a plural

Doubling does four jobs, and only the first is the plural everyone teaches.

Plural: buku-buku ‘books’
Part of the word: kupu-kupu ‘butterfly’, laba-laba ‘spider’. Take the doubling off and nothing is left.
Casual or aimless action: jalan ‘to walk’ → jalan-jalan ‘to go out, to wander’
A change of meaning entirely: mata ‘eye’ → mata-mata ‘a spy’

So doubling is not a plural marker. It is a process, and the plural is one of its results.

Particles: sih, dong, kok, lah

These carry the tone of a sentence, no textbook prints them, and every conversation is full of them.

sih asks for a reason, or softens a question: Kenapa sih? ‘Why though’
dong pleads or nudges: Jangan dong ‘Come on, don’t’
kok registers surprise: Kok mahal? ‘Why is it so expensive’
lah pushes, insists, or softens depending on where it lands: Ayolah
nih and tuh point: ‘here, this one’ and ‘there, that one’

You do not need to produce these for a long time. You need to stop hearing them as noise.

Commands and requests

The bare verb is already an imperative: Makan. ‘Eat.’ Which is blunt, so almost nobody leaves it there.

Makanlah with -lah, which softens
Tolong buka pintu ‘Please open the door’, with tolong for asking a favour
Coba lihat ‘Have a look’, with coba literally ‘try’
Minta air putih ‘Water, please’, with minta for asking to receive
Jangan lupa ‘Don’t forget’, the negative order

Tolong and minta are not interchangeable: tolong asks for an action, minta asks for a thing. The sorry and excuse me lesson sorts out the polite words that surround them.

What the book says, what you’ll hear

Every rule above is correct. Most of them are also dressed for an occasion that will not happen.

What the book says: Apakah Anda tidak mau minum sesuatu?
What you’ll hear: Nggak mau minum?

What the book says: Saya sedang menulis surat.
What you’ll hear: Aku lagi nulis surat.

Three things happened. Apakah vanished, because intonation already asked the question. Tidak became nggak and sedang became lagi. And menulis lost its prefix to become nulis, which is what casual speech does to me- across the board.

None of that is sloppy. It is the default, and the formal version is the marked one. A grammar page that stops before this point has taught you to write a form, not to talk to anyone.

The order to learn it in

Grammar overviews are for orientation, not for study. If you are starting, the sequence that pays fastest is this one.

First the sounds, because Indonesian spelling is honest and two days on pronunciation covers the whole year. Then word order and tidak against bukan, which is where beginners give themselves away. Then the tense words, which take an afternoon and unlock the past and the future at once. Then pronouns and register, together, because choosing saya or aku is a decision you make in every sentence.

Only then the affixes. They are the one genuinely hard part, they are what separates reading a newspaper from ordering coffee, and starting them in week one is how people conclude the language is hard.

The beginner course runs in exactly that order and labels the register on every example. If you have studied some already, the level test is twenty questions and tells you which of the sections above you can skip.