Thai Grammar Hub

Understand Thai Grammar Faster

Browse the grammar system by level and category, then open clear explanations with practical examples.

291 Total Rules
75 Chapters
7 CEFR level
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Active filters: CEFR level: B1
B1 Relative Clauses Verified

Using the Relative Clause `tee`

The word `tee` turns any noun into a specific subject by connecting it to a descriptive clause.

  • • Use `tee` to link nouns to descriptions.
  • • It functions like English 'that', 'which', or 'who...
10 examples 3 exercises 20 FAQ
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B1 Relative Clauses Verified

Mastering the Formal Relative Clause (`sueng`)

Use `sueng` as a formal relative pronoun in writing to add sophistication, but keep `thi` for daily speech.

  • • Used as a formal relative pronoun similar to 'whic...
  • • Primarily used in written Thai, news, and formal l...
2 examples 2 exercises 2 FAQ
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B1 Relative Clauses Verified

Thai Clause Reduction: How to sound local

Reduce your Thai sentences by omitting `ที่` to sound like a native speaker in casual situations.

  • • Omit `ที่` (tee) for faster, natural speech.
  • • Works best in casual, daily conversations.
2 examples 1 exercises
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B1 Conditionals Verified

Using the Conditional 'Tha' (ถ้า)

The word `ถ้า` (tha) is your simple, versatile gateway to expressing any 'if-then' conditional statement in Thai.

  • • Use `ถ้า` at the start of conditional clauses.
  • • No complex verb tense changes required in Thai.
10 examples 2 exercises 20 FAQ
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B1 Conditionals Verified

Conditional 'Phuea' (Purpose)

Think of `phuea` as the bridge between your current action and your future goal.

  • • Use `phuea` to express the purpose behind an actio...
  • • It translates roughly to 'in order to' or 'for the...
6 examples 2 exercises 2 FAQ
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B1 Conditionals Verified

Thai Hypotheticals (tha...cha)

Use `tha` for the condition and `cha` or `kong` for the result to express hypothetical situations in Thai.

  • • Use `tha` to start your 'if' statement.
  • • Thai verbs never change form for hypotheticals.
6 examples 2 exercises 2 FAQ
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B1 Passive & Reported Speech Verified

Thai Passive Voice: How to use `dai-rab`

Use `dai-rab` to describe being the recipient of an action, especially for formal or positive outcomes.

  • • Used to express receiving an action or event.
  • • Functions as a formal passive voice in Thai.
10 examples 3 exercises
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B1 Passive & Reported Speech Verified

Reported Speech with 'Wa' (ว่า)

The particle 'wa' is your essential bridge for reporting thoughts and statements in everyday Thai.

  • • Use 'wa' to connect verbs of speaking or thinking...
  • • Place 'wa' immediately after verbs like 'khit' (th...
5 examples 2 exercises
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B1 Passive & Reported Speech Verified

Reporting Speech in Thai (`wa`)

Simply put the speaker, the verb, and `wa` before the original sentence to report information naturally.

  • • Use `wa` to connect the speaker to the message.
  • • No tense changes needed for reported speech in Tha...
4 examples 3 exercises 3 FAQ
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B1 Tense & Aspect Verified

Present Continuous in Thai (กำลัง)

Use `gamlang` + verb (+ yuu) to describe actions happening right now in real-time.

  • • Use `gamlang` to describe ongoing actions.
  • • Place `gamlang` immediately before the verb.
12 examples 3 exercises 20 FAQ
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B1 Tense & Aspect Verified

Mastering the Thai 'Laew' (Already)

Adding `laew` turns any action into a finished event, just like adding 'already' in English.

  • • Use `laew` to indicate a completed action.
  • • Place `laew` immediately after the verb.
4 examples 2 exercises 2 FAQ
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B1 Verb Forms Verified

Causative 'Hai': Making Things Happen in Thai

The causative `hai` is your go-to tool for instructing others and making things happen in Thai.

  • • Use `hai` to command or request an action from som...
  • • Place `hai` between the main verb/intent and the p...
12 examples 3 exercises 20 FAQ
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B1 Verb Forms Verified

The Causative 'Tham-hai' (Make/Cause)

Use `tham-hai` to connect a cause to an effect, just like saying 'makes me' or 'causes me to'.

  • • Use `tham-hai` to express 'to make' or 'to cause'.
  • • Structure: Subject + `tham-hai` + Object + Result.
2 examples 1 exercises 1 FAQ
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B1 Verb Forms Verified

Thai Command Causatives: Using `hai`

The particle `hai` functions as a causative bridge to instruct others to perform specific actions.

  • • Use `hai` to delegate tasks to others.
  • • Place `hai` after the primary verb or instruction.
4 examples 1 exercises 1 FAQ
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B1 Particles Verified

Emphasis Particle: How to use 'Si' (สิ) in Thai

The particle `si` acts as an emphatic nudge, turning simple statements into firm advice or suggestions.

  • • Adds confidence or insistence to your Thai sentenc...
  • • Functions as a nudge or 'I told you so' marker.
10 examples 2 exercises 20 FAQ
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B1 Particles Verified

Using the Thai Friendly Particle 'Na'

Adding `na` to the end of a sentence softens your tone and builds rapport with the listener.

  • • Adds a soft, friendly tone to your sentences.
  • • Functions like a gentle reminder or suggestion.
10 examples 2 exercises 2 FAQ
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B1 Particles Verified

Thai Emphasis Particle: `wa` (ว่ะ)

The `wa` particle adds a blunt, frustrated, or aggressive tone to your speech, suitable only for close friends.

  • • Used for emphasis or frustration.
  • • Strictly for casual, close relationships.
10 examples 2 exercises 20 FAQ
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B1 Particles Verified

Thai Particle Stacking

Stacking particles allows you to layer politeness and mood to sound like a natural Thai speaker.

  • • Particles act like emotional emojis for your spoke...
  • • Stacking creates specific moods like urgency, frie...
10 examples 2 exercises 20 FAQ
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B1 Word Formation Verified

Thai Noun Marker: Feelings and Concepts (kwam)

Add `kwam` before an adjective to transform it into an abstract noun representing a feeling or state.

  • • Use `kwam` to turn adjectives into abstract nouns.
  • • Think of `kwam` as the Thai version of '-ness'.
6 examples 2 exercises 1 FAQ
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B1 Word Formation Verified

Noun-ifying Thai Verbs (การ/ความ)

Adding `การ` or `ความ` before a verb or adjective turns it into a noun.

  • • Use `การ` (gaan) to turn active verbs into nouns.
  • • Use `ความ` (khwaam) to turn adjectives/states into...
10 examples 3 exercises 20 FAQ
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B1 Conjunctions & Connectors Verified

Using 'Because' (เพราะ) in Thai

The word `เพราะ` is the most natural way to say 'because' in daily Thai conversation.

  • • Use `เพราะ` to express a reason or cause.
  • • Place it directly before the reason clause.
4 examples 2 exercises 1 FAQ
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Why Learn Thai Grammar?

Grammar is the foundation of language fluency. Without understanding grammar patterns, you can memorize vocabulary but struggle to form correct sentences. Here's why structured grammar study matters:

Build Accurate Sentences

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Knowing grammar helps you parse complex sentences, understand nuance, and follow conversations even when speakers use advanced constructions.

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How Our Thai Grammar Course Works

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Start with your CEFR level — from A0 Zero Point to C2 Mastery. Not sure? Begin at A0 and progress at your own pace.

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Study Structured Chapters

Each chapter covers a grammar topic with clear explanations, pattern tables, and real-world example sentences.

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Test your understanding with interactive exercises — fill-in-the-blank, multiple choice, sentence building, and translation practice.

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Frequently Asked Questions About Thai Grammar

SubLearn covers 291 Thai grammar rules organized across 7 CEFR proficiency levels (from A0 to C2), spanning 75 structured chapters. Each rule includes clear explanations, real-world examples, and interactive practice exercises.

Our Thai grammar curriculum covers CEFR levels from A0 to C2. Each level is designed to match your current proficiency — beginners start with basic sentence patterns at A1, while advanced learners tackle nuanced structures at C1-C2.

Yes! All Thai grammar rules, explanations, and examples are completely free to access. You can browse the full curriculum, read detailed explanations, and practice with exercises at no cost.

Grammar is organized into 75 thematic chapters following the CEFR framework. Each chapter groups related rules together — for example, verb tenses, sentence structure, or particles — so you can learn related concepts in a logical sequence.

Yes! Create a free account to track which grammar rules you've studied, see your progress across all CEFR levels, and pick up exactly where you left off. Your learning progress syncs across devices.

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