Contradicting a Statement with 'ไม่ได้' — Thai Grammar

The phrase (mâi·dâi) is a versatile negation marker. While it is composed of the words (mâi), meaning no/not, and (dâi), meaning can/get, its meaning changes significantly depending on where it is placed in a sentence.

When placed before a verb, (mâi·dâi) functions as a past tense marker or a contradiction.

Indicating Past Tense (Didn't)

Thai verbs do not change their form to indicate tense (conjugation). Instead, you add specific words to set the timeframe. To say that an action did not happen in the past, place (mâi·dâi) immediately before the verb. In this context, it translates to didn't.

เขาไม่ได้มา
kǎo mâi·dâi maakhǎo mâi·dâi makhǎo mâi·dâi ma
He didn't come.
เมื่อวานฉันไม่ได้ทำงาน
mʉ̂ʉa·waan chǎn mâi·dâi tam·ngaanmûea·wan chǎn mâi·dâi tham·nganmư̂a·wan čǎn mâi·dâi tham·ngan
Yesterday I didn't work.
เราไม่ได้ซื้ออันนั้น
rao mâi·dâi sʉ́ʉ an·nánrao mâi·dâi súe an·nánrao mâi·dâi sứ an·nán
We didn't buy that one.

Contradicting Statements

You also use (mâi·dâi) before a verb to contradict a statement or a false assumption made by someone else. This is used to deny an accusation or clarify that a specific action is not taking place, regardless of the tense.

For example, if someone assumes you are sleeping, but you are actually just resting your eyes, you would use (mâi·dâi) to correct them.

ฉันไม่ได้นอน
chǎn mâi·dâi nɔɔnchǎn mâi·dâi nončǎn mâi·dâi no̦n
I am not sleeping (or: I didn't sleep).
ผมไม่ได้พูด
pǒm mâi·dâi pûutphǒm mâi·dâi phûtphǒm mâi·dâi phût
I didn't say (that).
เขาไม่ได้ชอบคุณ
kǎo mâi·dâi chɔ̂ɔp kunkhǎo mâi·dâi chôp khunkhǎo mâi·dâi čô̦p khun
He doesn't like you (contrary to what you think).

Distinguishing "Didn't" from "Cannot"

It is crucial to pay attention to word order. The position of (mâi·dâi) relative to the verb completely changes the meaning.

Before the verb: (mâi·dâi) + Verb = Didn't (Past negation or contradiction).
After the verb: Verb + (mâi·dâi) = Cannot (Lack of ability or permission).

Compare these two examples:

ฉันไม่ได้ไป
chǎn mâi·dâi bpaichǎn mâi·dâi paičǎn mâi·dâi pai
I didn't go.
ฉันไปไม่ได้
chǎn bpai mâi·dâichǎn pai mâi·dâičǎn pai mâi·dâi
I cannot go.

In the course

Sentences from Lingora’s Thai course

7 of the course's 500 sentences use this, the first in lesson 16. A few of them, with the words “Contradicting a Statement with 'ไม่ได้'” is about in bold:

เขาก็กำลังหลับอยู่ เธอไม่ได้หลับ
kǎo gɔ̂ɔ gam·lang làp yùu · təə mâi·dâi làpkhǎo kô kam·lang làp yù · thoe mâi·dâi làpkhǎo kô̦ kam·lang làp yù · thơ mâi·dâi làp
He is also sleeping. She isn't.
Lesson 16
ผมรู้สึกดีมาก! ผมไม่ได้ป่วย ผมแข็งแรงดี
pǒm rúu·sʉ̀k dii mâak! pǒm mâi·dâi bpùai pǒm kɛ̌ng·rɛɛng diiphǒm rú·sùek di mâk! phǒm mâi·dâi pùai phǒm khǎeng·raeng diphǒm rú·sừk di mâk! phǒm mâi·dâi pùai phǒm khě̩ng·re̩ng di
I feel great! I am not sick. I am healthy.
Lesson 64
ฉันไม่ได้เจอเธอมาเก้าปีแล้ว!
chǎn mâi·dâi jəə təə maa gâao bpii lɛ́ɛo!chǎn mâi·dâi choe thoe ma kâo pi láeo!čǎn mâi·dâi čơ thơ ma kâo pi lé̩o!
I haven't seen you for nine years!
Lesson 175

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