Thai Grammar Basics: How Thai Sentences Work

Thai grammar is simpler than most learners expect. The basic word order is subject + verb + object, like English. Verbs never conjugate, nouns have no plural, no gender and no articles, and time is shown with a few small words placed before or after the verb. The real challenges are elsewhere: modifiers that come after the noun, adjectives that work like verbs, and classifiers for counting.

This guide covers the patterns you need for your first hundred sentences, each with an example you can reuse.

Thai word order: subject, verb, object

A basic Thai sentence is built like an English one:

ฉันกินข้าว chǎn gin kâao: I eat rice.

ฮิวโก้ดื่มกาแฟ hiu-gôo dʉ̀ʉm gaa-fɛɛ: Hugo drinks coffee.

Time and place expressions are usually placed at the beginning or at the end of the sentence. This line from the story Morning coffee puts both time words first:

ทุกวันตอนเช้าฮิวโก้ดื่มกาแฟ túk-wan dtɔɔn-cháao hiu-gôo dʉ̀ʉm gaa-fɛɛ: Every morning, Hugo drinks coffee.

When the subject is obvious, Thai simply leaves it out. A friend asks หิวไหม hǐu mǎi (“hungry?”) and you answer หิว hǐu (“hungry”). No “I”, no “am”. Dropping pronouns is normal, not lazy; using them every time can even sound a little stiff.

Adjectives come after the noun

This is the first real difference from English. In Thai, the main word comes first and everything that describes it follows, like in French:

“Very” also follows: สวยมาก sǔai mâak, “very beautiful”. And “this” and “that” come last, usually after a classifier (dtua for animals in แมวตัวนี้). The rule is consistent, so once you start thinking “noun first, details after”, long noun phrases become easy to decode.

No conjugation, no plurals, no articles, no gender

Verbs never change

ไป bpai means “go”, “goes”, “went”, “will go” and “gone”. There is no “-ed”, no “-s”, no irregular verbs to memorize. Who does the action is shown by the subject, and when it happens is shown by context or a time word.

Nouns have no plural

แมว mɛɛo is “cat” or “cats”. If the number matters, you add it with a classifier (see below), or use a word like หลาย lǎai (“many”): เพื่อนหลายคน pʉ̂an lǎai kon, “many friends”. Some words can be doubled to give a sense of plurality: เด็กๆ dèk-dèk, “the kids” (the sign ๆ repeats the word).

No “a” or “the”

ข้าว kâao can be “rice”, “a meal” or “the meal”. When you really need “a certain…”, Thai uses classifier + หนึ่ง nʉ̀ng (one): แมวตัวหนึ่ง mɛɛo dtua nʉ̀ng, “a cat”.

No grammatical gender

Nouns are neither masculine nor feminine. What does depend on gender is the speaker: men end sentences with ครับ kráp and often say ผม pǒm for “I”, women use ค่ะ kâ and often ฉัน chǎn. See our guide to Thai polite particles for when and how to use them.

Showing time: แล้ว, กำลัง, จะ and เคย

Since verbs don’t change, Thai relies on time words (เมื่อวาน mʉ̂a-waan “yesterday”, วันนี้ wan-níi “today”, พรุ่งนี้ prûng-níi “tomorrow”) and on four markers you will hear constantly:

A few notes on usage:

• แล้ว marks a change of state as much as a past action. ฝนตกแล้ว fǒn dtòk lɛ́ɛo means “it has started raining” (it wasn’t a moment ago). In the story Good news, the first line is มะลิเลิกงานแล้ว má-lí lə̂ək-ngaan lɛ́ɛo: “Mali has finished work.”
• กำลัง is often paired with อยู่ yùu after the verb: กำลังกินข้าวอยู่ gam-lang gin kâao yùu. อยู่ alone after the verb also gives the sense of “-ing”.
• จะ is optional when the time word is clear: พรุ่งนี้ไปตลาด prûng-níi bpai dtà-làat is fine, but จะ makes the intention explicit.
• เคย with ไม่ gives “never”: ไม่เคยกินส้มตำ mâi kəəi gin sôm-dtam, “I’ve never eaten som tam.”

Negation with ไม่ and ไม่ใช่

To make a sentence negative, put ไม่ mâi directly before the verb or adjective:

ผมไม่หิว pǒm mâi hǐu: I’m not hungry.

ไม่แพง mâi pɛɛng: It’s not expensive.

ฉันไม่ชอบผักชี chǎn mâi chɔ̂ɔp pàk-chii: I don’t like coriander.

To deny an identity (“it’s not…”, “I’m not a…”), use ไม่ใช่ mâi-châi: ผมไม่ใช่ครู pǒm mâi-châi kruu, “I’m not a teacher”. On its own, ไม่ใช่ also means “no, that’s not right”.

Two patterns with ได้ dâai are worth learning now. After the verb, ไม่ได้ means “can’t”: ไปไม่ได้ bpai mâi dâai, “I can’t go”. Before the verb, it denies a past action: ไม่ได้ไป mâi dâai bpai, “I didn’t go”.

Mind the tones: ไม่ mâi (not, falling), ไหม mǎi (question, rising) and ใหม่ mài (new, low) are three different words. If the tones are still new to you, start with our guide to the five Thai tones.

Adjectives are verbs: no “to be”

In Thai, an adjective can be the whole predicate. There is no “is”:

อาหารอร่อย aa-hǎan à-ròi: The food is delicious.

วันนี้ร้อนมาก wan-níi rɔ́ɔn mâak: It’s very hot today.

That is why กาแฟร้อน gaa-fɛɛ rɔ́ɔn can mean “hot coffee” or “the coffee is hot”: context decides. Adjectives behave like verbs in every way, so they take ไม่, แล้ว or จะ directly: ไม่ร้อน mâi rɔ́ɔn, “not hot”.

Thai does have words for “to be”, but each has its own job:

The most common beginner mistake is to put เป็น before an adjective. Say ผมเหนื่อย pǒm nʉ̀ai (“I’m tired”), never ผมเป็นเหนื่อย.

Possession with ของ

ของ kɔ̌ɔng means “of” or “belonging to”. The thing comes first, the owner second:

บ้านของยาย bâan kɔ̌ɔng yaai: Yai’s house (house of grandma)

อันนี้ของผม an-níi kɔ̌ɔng pǒm: This one is mine.

In everyday speech ของ is often dropped when the relationship is obvious: บ้านยาย bâan yaai, แม่ฉัน mɛ̂ɛ chǎn (“my mother”).

Asking yes/no questions with ไหม

The simplest question is a statement with ไหม mǎi at the end. Word order doesn’t change:

คุณหิวไหม kun hǐu mǎi: Are you hungry?

เผ็ดไหม pèt mǎi: Is it spicy?

Thai has no single word for “yes” or “no”: you answer by repeating the verb, with or without ไม่. หิว hǐu (“yes”), ไม่หิว mâi hǐu (“no”). Question words like “what” and “where” also stay where the answer would go, usually at the end. All of this is detailed in our article on Thai question words.

Serial verbs: ไปกินข้าว

Thai likes to chain verbs one after another, with no “to” and no “and” between them:

ไปกินข้าว bpai gin kâao: go (and) eat

ฮิวโก้อยากไปดูตลาดใหม่ hiu-gôo yàak bpai duu dtà-làat mài: Hugo wants to go and see a new market.

The second sentence comes from the opening of the story Lost in Bangkok: three verbs in a row, อยาก yàak (want), ไป bpai (go), ดู duu (look). ไป and มา maa are also placed after a verb to show direction: วิ่งมา wîng maa, “come running” (run toward here), เดินไป dəən bpai, “walk away/over there”.

Counting with classifiers

You can’t put a number straight before a noun. The pattern is noun + number + classifier:

กาแฟสองแก้ว gaa-fɛɛ sɔ̌ɔng gɛ̂ɛo: two coffees (coffee two glass)

นักเรียนสามคน nák-rian sǎam kon: three students

The classifier depends on the kind of thing: คน kon for people, ตัว dtua for animals and clothes, แก้ว gɛ̂ɛo for drinks. Our guide to Thai classifiers lists the ones you’ll actually need.

How to practise Thai grammar

• Learn sentences, not rules. Grammar sticks when you have a dozen model sentences in your head, like the ones above, and change one word at a time.
• Listen for the markers. In any Thai sentence, look for แล้ว, จะ, ไม่ and ไหม: they tell you the time and the meaning before you know every word.
• See each pattern in context. In Kru May, a small grammar badge appears in the story where a pattern is first used, and the stories below use these patterns in short, simple scenes.