Thai Question Words Quiz — Question Quest Three-Level Game (Free)

The most useful single category of Thai vocabulary is not greetings, not numbers, not food words — it is question words. Every question you will ever ask in Thailand starts with or contains one. Get the question words right and you unlock the ability to get information from any Thai speaker in any situation, regardless of how limited the rest of your vocabulary is.

Thai question words have a quirk that trips up almost every learner from English: they do not go at the beginning of the sentence. In English, "What is this?" front-loads the question word. In Thai, the question word goes where the answer would go — typically at the end of the sentence, or at least after the verb. นี่คืออะไร (nii khue arai — what is this?) puts "what" at the end. Understanding this one structural difference makes Thai questions immediately more natural.

This post covers fifteen question words — from the essential five that every visitor needs in the first hour to the subtler particles that distinguish a genuine question from a confirmation request. Each word includes its position in a sentence, common mistakes, and the real situations where you will need it most.

The Five You Cannot Leave Home Without

Thai has a small set of question words that cover the vast majority of daily situations. Master these five and you can function in almost any information-seeking scenario:

The How Words — Three Different Flavours

Thai has several ways to ask "how" depending on what you want to know, and they are not interchangeable. Getting the right one into the right situation is one of the more nuanced parts of Thai questioning:

The Which Words — Choosing and Specifying

Thai has a family of "which" words built on the word ไหน (nai), each specifying a different type of choice:

Yes/No Questions — Three Ways to Ask

Thai yes/no questions work very differently from English. You do not invert the word order or use an auxiliary verb. Instead, you add a question particle at the end of a statement. Thai has three main particles for this, each with a slightly different social register:

Question Words in the Wild — Real Situations

Here is how these question words appear in the Thai interactions you will actually have:

Question Particles vs Question Words — The Structural Difference

Thai draws a clear distinction between question words (which replace the unknown information) and question particles (which convert a statement into a yes/no question). Understanding this distinction prevents a common mistake where learners add ไหม (mai) to sentences that already have a question word, creating a double question structure that Thai does not use.

If a sentence already has อะไร (arai — what), ที่ไหน (tii nai — where), or any other wh-question word, do not add mai at the end. The question is already formed. Adding mai would be like saying "What is this, isn't it?" in English — grammatically confused. The particles mai, rue plao, and chai mai are only used in yes/no questions with no other question word present.

The Rhythm of Thai Questions

Thai questions have a natural spoken rhythm that learners often miss when they are focused on individual words. Questions ending with ไหม (mai — the particle) have a slight rise in the final syllable, matching the rising particle tone. Questions ending with a wh-question word like อะไร (arai) often have a falling cadence on the question word itself. And ใช่ไหม (chai mai — right?) frequently ends with a lifted, almost rhetorical lilt that signals you are seeking agreement more than information.

This rhythm is not something to consciously produce — it comes naturally as you absorb more spoken Thai. But knowing it exists helps you identify question structures when listening, even before you have caught all the individual words.

The Question Quest game below has three levels: recognise the question word from its meaning, choose the right word for a real situation, and at Level 3 — the hardest — pick the correctly formed complete question. 🎯